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Yamaha RAPTORYFM660RS Owner's Manual
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Yamaha RAPTORYFM660RS Owner's Manual

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READ THIS MANUAL CAREFULLY!
It contains important safety information.
OWNER'S MANUAL
YFM660RS
WARNING
This ATV should not be ridden by anyone under 16 years of age.
LIT-11626-17-05
5LP-28199-13

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Summary of Contents for Yamaha RAPTORYFM660RS

  • Page 1 READ THIS MANUAL CAREFULLY! It contains important safety information. OWNER’S MANUAL YFM660RS WARNING This ATV should not be ridden by anyone under 16 years of age. LIT-11626-17-05 5LP-28199-13...
  • Page 2 EBU00776...
  • Page 3 Yamaha experience in the production of fine sporting, touring, and pacesetting racing machines. With the purchase of this Yamaha, you can now appreciate the high degree of crafts- manship and reliability that have made Yamaha a leader in these fields. This manual will provide you with a good basic understanding of the features and operation of this ATV.

  • Page 4: Warning

    EBU00801 IMPORTANT MANUAL INFORMATION FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS INJURY OR DEATH. Particularly important information is distinguished in this manual by the following notations: The Safety Alert Symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! Failure to follow WARNING instructions could result in severe in- WARNING...
  • Page 5 Please check your local riding laws and regulations before operating this machine. EBU00981 YFM660RS OWNER’S MANUAL ©2003 by Yamaha Motor Corporation, AFFIX DEALER U.S.A. 1st edition, February 2003 LABEL HERE All rights reserved.

  • Page 6: Table Of Contents

    EBU00014 CONTROL FUNCTIONS....4-1 WARNING Main switch ........4-1 Indicates a potential hazard that could Indicator and warning lights .....4-2 result in serious injury or death. Handlebar switches ......4-4 Throttle lever ........4-6 Speed limiter ........4-7 CONTENTS Clutch lever ........4-8 Brake lever........4-8 Brake pedal........4-9 LOCATION OF THE WARNING AND Parking brake.........4-10 SPECIFICATION LABELS....
  • Page 7 PRE-OPERATION CHECKS ... 5-1 Engine break-in ....... 6-9 Front and rear brakes ..... 5-3 Parking........... 6-10 Fuel ..........5-4 Parking on a slope......6-11 Engine oil ........5-6 Accessories and loading ....6-12 Coolant..........5-7 Chain..........5-8 RIDING YOUR ATV ......7-1 Throttle lever ........
  • Page 8 PERIODIC MAINTENANCE AND Adjusting the rear brake light ADJUSTMENT........8-1 switch ...........8-32 Owner’s manual and tool kit.... 8-1 Clutch lever free play adjustment ..8-32 Periodic maintenance/ Drive chain slack check ....8-34 lubrication ........8-3 Drive chain slack adjustment..8-35 Panel removal and installation ..8-5 Lubricating the drive chain.....8-36 Engine oil and oil filter cartridge ..
  • Page 9 CLEANING AND STORAGE.... 9-1 A. Cleaning........9-1 B. Storage ........9-3 SPECIFICATIONS......10-1 NOISE REGULATION....11-1 MAINTENANCE RECORD .... 12-1 ATV LIMITED WARRANTY.... 13-1 YAMAHA EXTENDED SERVICE (Y.E.S.) ........... 14-1...

  • Page 10: Location Of The Warning And Specification Labels

    EBU00464 LOCATION OF THE WARNING AND SPECIFICATION LABELS...
  • Page 11 ATV. Never remove any labels from your ATV. If a label becomes difficult to read or comes off, a replacement label is available from your Yamaha dealer. WARNING UNDER Operating this ATV if you are under the age of 16 increases your chance of severe injury or death.

  • Page 13: Safety Information

    EBU00924 SAFETY INFORMATION AN ATV IS NOT A TOY AND CAN BE HAZARDOUS TO OPERATE. An ATV handles differently from other vehicles including motorcycles and cars. A collision or rollover can occur quickly, even during routine maneuvers such as turning and riding on hills or over obstacles, if you fail to take proper precautions.
  • Page 14 Always avoid operating an ATV on any paved surfaces, including sidewalks, driveways, park- ing lots and streets. Never operate an ATV on any public street, road or highway, even a dirt or gravel one. Never operate an ATV without wearing an approved motorcycle helmet that fits properly. You should also wear eye protection (goggles or face shield), gloves, boots, long-sleeved shirt or jacket, and long pants.
  • Page 15 Always follow proper procedures for turning as described in this manual. Practice turning at low speeds before attempting to turn at faster speeds. Do not turn at excessive speed. Never operate the ATV on hills too steep for the ATV or for your abilities. Practice on smaller hills before attempting larger hills.
  • Page 16 Always use proper procedures if you stall or roll backwards when climbing a hill. To avoid stall- ing, use proper gear and maintain a steady speed when climbing a hill. If you stall or roll back- wards, follow the special procedure for braking described in this manual. Dismount on the uphill side or to a side if pointed straight uphill.
  • Page 17 Always use the size and type tires specified in this manual. Always maintain proper tire pressure as described in this manual. Never modify an ATV through improper installation or use of accessories. Never exceed the stated load capacity for an ATV. Cargo should be properly distributed and securely attached.
  • Page 18 WARNING When transporting the ATV in another vehicle, be sure it is kept upright and POTENTIAL HAZARD that the fuel cock is in the “OFF” posi- Improper handling of gasoline. tion. Otherwise, fuel may leak out of the WHAT CAN HAPPEN carburetor or fuel tank.
  • Page 19 WARNING POTENTIAL HAZARD Starting or running the engine in a closed area. WHAT CAN HAPPEN Exhaust fumes are poisonous and may cause loss of consciousness and death within a short time. HOW TO AVOID THE HAZARD Always operate your ATV in an area with adequate ventilation.

  • Page 20: Description And Machine Identification

    EBU00032 DESCRIPTION AND MACHINE IDENTIFICATION 10. Tail/brake light 1. Spark arrester 2. Seat 11. Shift pedal 3. Fuel tank cap 12. Clutch lever 4. Engine oil tank 13. Handlebar switches 5. Brake pedal 14. Parking brake 6. Headlights 15. Main switch 7.

  • Page 21: Identification Number Records

    This number can be used for ordering a new when ordering spare parts from a Yamaha key. dealer or for reference in case the vehicle is stolen.

  • Page 22: Vehicle Identification Number

    Record the information on this la- bel in the space provided. This information will be needed to order spare parts from your Yamaha dealer. 1. Vehicle identification number NOTE: The vehicle identification number is used to 1.

  • Page 23: Control Functions

    EBU00039 CONTROL FUNCTIONS WARNING Indicates a potential hazard that could result in serious injury or death. EBU00942 Main switch Functions of the respective switch positions are as follows: The engine can be started only at this position and the headlights and taillight come on when the light switch is on.

  • Page 24: Indicator And Warning Lights

    EBU00802 EBU00713 Indicator and warning lights Coolant temperature warning light “ ” When the coolant temperature reaches a specified level, this light comes on to warn that the coolant temperature is too hot. If the light comes on during operation, stop the en- gine as soon as it is safe to do so and allow the engine to cool down for about 10 minutes.
  • Page 25 Coolant temperature Coolant temperature warning light comes on warning light does not momentarily. come on. Coolant temperature and electrical circuit are OK. Go Ask a Yamaha dealer to ahead with riding. inspect the electrical circuit.

  • Page 26: Handlebar Switches

    EBU00053 Handlebar switches CAUTION: Do not use the headlights with the engine turned off for more than thirty minutes. The battery may discharge to the point that the starter motor will not operate properly. If this should happen, remove the battery and recharge it. EBU01205 Engine stop switch “...
  • Page 27 EBU00607 Start switch “ ” The starter motor cranks the engine when this switch is pushed. CAUTION: See starting instructions prior to starting the engine. (See page 6-1 for details.)

  • Page 28: Throttle Lever

    Check the operation of the throttle lever before you start the engine. If it does not work smoothly, check for the cause. Correct the problem before riding the ATV. Consult a Yamaha dealer if you 1. Throttle lever can’t find or solve the problem yourself.

  • Page 29: Speed Limiter

    EBU01159 Speed limiter WARNING The speed limiter keeps the throttle from fully POTENTIAL HAZARD opening, even when the throttle lever is Improper adjustment of the speed limit- pushed to the maximum. Turning in the ad- er and throttle. justing screw limits the maximum engine pow- WHAT CAN HAPPEN er available and decreases the maximum The throttle cable could be damaged.

  • Page 30: Clutch Lever

    EBU00069 EBU00988 Clutch lever Brake lever The clutch lever is located on the left handle- The brake lever is located on the right handle- bar and the ignition circuit cut-off system is in- bar. Pull it toward the handlebar to apply the corporated in the clutch lever holder.

  • Page 31: Brake Pedal

    EBU00989 Brake pedal The brake pedal is located on the right side of the machine. Push down on the pedal to apply the rear brake. 1. Brake pedal...

  • Page 32: Parking Brake

    EBU00080 Parking brake Use the parking brake when you have to start the engine or park the machine, especially on a slope. Squeeze the clutch lever while push- ing the button, then push in the lock plate to apply the parking brake. Squeeze the clutch lever to release the parking brake.

  • Page 33: Shift Pedal

    EBU00788 Shift pedal WARNING This machine is equipped with a constant- POTENTIAL HAZARD mesh 5-speed forward and 1-speed reverse Improper use of the parking brake. transmission. The shift pedal is located on the WHAT CAN HAPPEN left side of the engine and is used in combina- The ATV could start moving unexpect- tion with the clutch when shifting.

  • Page 34: Reverse Knob

    EBU01028 EBU00092 Reverse knob “REV” Fuel tank cap The reverse knob is used to shift into reverse Remove the fuel tank cap by turning it coun- gear. terclockwise. Refer to the “Reverse knob operation and re- verse driving” section (page 6-5) before oper- ating this machine in reverse gear.

  • Page 35: Fuel Cock

    EBU00093 Fuel cock The fuel cock supplies fuel from the fuel tank to the carburetor. The fuel cock has three positions. OFF: With the lever in this position, fuel will not flow. Always turn the lever to this position when the engine is not running. ON: With the lever in this position, fuel flows to the carburetor.

  • Page 36: Starter (Choke)

    EBU00095 EBU01010 Starter (choke) “ ” Seat Starting a cold engine requires a richer air-fuel To remove the seat, insert your hand between mixture. A separate starter circuit supplies this the rear of the seat and the rear fender, pull mixture.
  • Page 37 To install the seat, insert the projections on the front of the seat into the seat holders and push down on the seat at the rear. NOTE: Make sure that the seat is securely fitted. 1. Projection (× 2) 2. Seat holder (× 2) 4-15...

  • Page 38: Front Shock Absorber Adjustment

    1. Special wrench Standard position: C A - Minimum (soft) E - Maximum (hard) 1. Spring preload adjusting ring 2. Position indicator NOTE: A special wrench can be obtained at a Yamaha dealer to make this adjustment. 4-16...
  • Page 39 WARNING POTENTIAL HAZARD Improper shock absorber adjustment. WHAT CAN HAPPEN Uneven adjustment can cause poor handling and loss of stability, which could lead to an accident. HOW TO AVOID THE HAZARD Always adjust the shock absorbers on the left and right side to the same set- ting.

  • Page 40: Rear Shock Absorber Adjustment

    A special wrench can be obtained at a Do not deform or damage the cylinder Yamaha dealer to make this adjustment. in any way. Do not dispose of a damaged or worn out shock absorber yourself. Take the unit to a Yamaha dealer.
  • Page 41 3. The length of the spring (installed) 4. Tighten the locknut to the specified changes 1.5 mm (0.06 in) per turn of the torque. adjusting nut. Tightening torque: Measurement A: 42 Nm (4.2 m·kgf, 30 ft·lbf) Installed length: CAUTION: Minimum (hard): 232 mm (9.1 in) Standard: 240 mm (9.4 in) Always tighten the locknut against the ad- Maximum (soft): 247 mm (9.7 in)
  • Page 42 Adjust the rebound damping force as follows. Adjust the compression damping force as fol- Turn the rebound damping force adjusting lows. screw in direction a to increase the rebound Turn the compression damping force adjust- damping force and in direction b to decrease ing screw in direction a to increase the com- pression damping force and in direction b to the rebound damping force.

  • Page 43: Specifications

    CAUTION: WARNING Never turn an adjusting mechanism be- POTENTIAL HAZARD yond the minimum and maximum settings. Suspension components become hot during operation. NOTE: WHAT CAN HAPPEN Although the total number of clicks of a damp- You could be burned. ing force adjusting mechanism may not exact- HOW TO AVOID THE HAZARD ly match the above specifications due to small Never touch the compression damping...

  • Page 44: Pre-Operation Checks

    PRE-OPERATION CHECKS Before using this machine, check the following points: ITEM ROUTINE PAGE • Check operation, lever free play, fluid level and fluid leakage. 5-3–5-4, Front brake • Fill with DOT 4 brake fluid if necessary. 8-25–8-28 • Check operation, fluid level and fluid leakage. 5-3–5-4, Rear brake •...
  • Page 45 WARNING POTENTIAL HAZARD Failure to inspect the ATV before oper- ating. Failure to properly maintain the ATV. WHAT CAN HAPPEN Increases the possibility of an accident or equipment damage. HOW TO AVOID THE HAZARD Always inspect your ATV each time you use it to make sure the ATV is in safe op- erating condition.

  • Page 46: Front And Rear Brakes

    Check that there is no free play in the brake the pipe joints or brake fluid reservoirs. Apply lever. If there is free play, have a Yamaha the brakes firmly for one minute. If there is any dealer inspect the brake system.

  • Page 47: Fuel

    Yamaha dealer check for and piston rings, as well as to the exhaust the cause. system.
  • Page 48 Fuel can spill, which can cause a fire hol containing methanol is not recommended and severe injury. by Yamaha because it may cause fuel system Fuel expands when it heats up. If the damage or vehicle performance problems. fuel tank is overfilled, fuel could spill out due to heat from the engine or the sun.

  • Page 49: Engine Oil

    EBU13730 Engine oil CAUTION: Make sure the engine oil is at the specified In order to prevent clutch slippage level. Add oil as necessary. (See page 8-6.) (since the engine oil also lubricates the clutch), do not mix any chemical Recommended oil: additives.

  • Page 50: Coolant

    EBU12530 Coolant WARNING Check the coolant level in the coolant reser- POTENTIAL HAZARD voir when the engine is cold. (The coolant lev- Removing the radiator cap when the en- el will vary with engine temperature.) The gine and radiator are still hot. coolant level is satisfactory if it is between the WHAT CAN HAPPEN minimum and maximum level marks on the...

  • Page 51: Chain

    Yamaha dealer repair as necessary for proper operation. EBU01162 Fittings and fasteners Always check the tightness of chassis fittings and fasteners before a ride. Take the machine to a Yamaha dealer or refer to the Service Manual for correct tightening torque.

  • Page 52: Tires

    The following are minimums: 1. The tires listed below have been ap- Front 24.5 kPa (0.245 kgf/cm , 3.5 psi) proved by Yamaha Motor Co., Ltd. Rear 24.5 kPa (0.245 kgf/cm , 3.5 psi) for this model. Other tire combina- tions are not recommended.

  • Page 53: How To Measure Tire Pressure

    Set pressure with tires cold. 4. Use no more than the following Set tire pressures to the following specifica- pressures when seating the tire tions: beads. Front 250 kPa (2.5 kgf/cm , 36 psi) Recommended Minimum Maximum pressure Rear 250 kPa (2.5 kgf/cm , 36 psi) Higher pressures may cause the 27.5 kPa...

  • Page 54: Tire Wear Limit

    EBU00160 Tire wear limit When the tire groove decreases to 3 mm (0.12 in) due to wear, replace the tire. a. Tire wear limit 5-11...

  • Page 55: Operation

    2. Turn the fuel cock to “ON”. there is a control or function you do not 3. Turn the main switch to “ON” and the en- understand, ask your Yamaha dealer. gine stop switch to “ ”. 4. Shift the transmission into neutral.
  • Page 56 When the transmission is in neutral. The neutral indicator light should come on. If the light does not come on, ask a Yamaha dealer to inspect it. When the clutch is disengaged with the transmission in any position. However, it is recommended to shift into neutral be- fore starting the engine.
  • Page 57 NOTE: CAUTION: If the engine fails to start, release the start See the “Engine break-in” section prior to switch, then push it again. Pause a few sec- operating engine for the first time. onds before the next attempt. Each cranking should be as short as possible to preserve battery energy.

  • Page 58: Starting A Warm Engine

    EBU00180 Starting a warm engine To start a warm engine, refer to the “Starting a cold engine” section. The starter (choke) should not be used. The throttle should be opened slightly. EBU00538 Warming up To get maximum engine life, always warm up the engine before starting off.

  • Page 59: Reverse Knob Operation And

    If the light does not come on, 2. While applying the brake pedal, turn the ask a Yamaha dealer to inspect the machine. reverse knob clockwise with your right hand. 4. Check behind you for people or obsta- 3.

  • Page 60: Shifting

    EBU01173 Shifting WARNING This model has a 5-speed forward and 1-speed POTENTIAL HAZARD reverse transmission. The transmission allows Improperly operating in reverse. you to control the amount of power you have WHAT CAN HAPPEN available at a given speed or for starting, accel- You could hit an obstacle or person be- erating, climbing hills, etc.

  • Page 61: To Start Out And Accelerate

    EBU00203 To start out and accelerate: CAUTION: 1. Release the throttle lever. Do not coast for long periods with the engine off, and do not tow the ma- CAUTION: chine a long distance. Even in neutral Always close the throttle while shifting position, the transmission is only gears.

  • Page 62: To Decelerate

    EBU00207 8. Follow the same procedure when shifting To decelerate: to the next higher gear. When slowing down or stopping, release the throttle and apply the brakes smoothly and WARNING evenly. As you slow down, shift to a lower POTENTIAL HAZARD gear.

  • Page 63: Engine Break-In

    Because the engine is If any abnormality is noticed during this peri- brand new, you must not put an excessive od, consult a Yamaha dealer. load on it for the first several hours of running. 1. 0–10 hours:...

  • Page 64: Parking

    EBU00211 Parking When parking, stop the engine and shift into neutral. Turn the fuel cock to “OFF” and apply the parking brake. 1. Locked position 1. Button 2. Lock plate 6-10...

  • Page 65: Parking On A Slope

    EBU01174 Parking on a slope 1. Bring the machine to a stop by applying the brakes in low gear. WARNING 2. Stop the engine and release the clutch POTENTIAL HAZARD lever. Parking on a hill or other incline. 3. With the rear brake applied, apply the WHAT CAN HAPPEN parking brake and slowly release the The ATV could roll out of control, in-...

  • Page 66: Accessories And Loading

    Choose only accessories designed for your Use extra caution when riding an ATV with ATV. Your Yamaha dealer has a variety of accessories. The ATV may handle differ- genuine Yamaha accessories. Other ac- ently than it does without accessories.
  • Page 67 EBU00584 Loading Tie down cargo securely to the carriers. As originally equipped, this ATV is not de- Make sure cargo in the trailer cannot move signed to carry cargo or tow a trailer. If you around. A shifting load can cause an acci- choose to add accessories so that you can dent.
  • Page 68 WARNING POTENTIAL HAZARD Overloading this ATV or carrying or tow- ing cargo improperly. WHAT CAN HAPPEN Could cause changes in vehicle han- dling which could lead to an accident. HOW TO AVOID THE HAZARD Never exceed the stated load capacity for this ATV.
  • Page 69 6-15...
  • Page 70 EBU13551 WARNING Indicates a potential hazard that could result in serious injury or death. 6-16...
  • Page 71 R iding Your...

  • Page 73: Getting To Know Your Atv

    WARNING Indicates a potential hazard that could result in serious injury or death. tion to the safety information on pages 2-1– GETTING TO KNOW YOUR ATV 2-7. Please also read all caution and warning This ATV is intended for recreational use by labels on your ATV.

  • Page 74: Ride With Care And Good Judgement

    JUDGEMENT Beginning and inexperienced operators should complete the certified training Get training if you are inexperienced. course offered by Yamaha. They should Beginners should get training from a certified then regularly practice the skills learned instructor. in the course and the operating tech- Become familiar with this ATV at slow speeds niques described in this Owner’s Manu-...
  • Page 75 Not recommended for children under 16 years of age. WARNING POTENTIAL HAZARD Failure to follow the age recommenda- tions for this ATV. WHAT CAN HAPPEN Use by children of ATVs that are not rec- ommended for their age can lead to se- vere injury or death of the child.
  • Page 76 This ATV is designed to carry operator only - passengers prohibited. WARNING POTENTIAL HAZARD Carrying a passenger on this ATV. WHAT CAN HAPPEN Greatly reduces your ability to balance and control this ATV. Could cause an accident, resulting in harm to you and/ or your passenger.
  • Page 77 Apparel Operating without protective clothing WARNING increases your chances of severe injury in the event of an accident. POTENTIAL HAZARD HOW TO AVOID THE HAZARD Operating this ATV without wearing an Always wear an approved motorcycle approved motorcycle helmet, eye pro- helmet that fits properly.
  • Page 78 Do not operate after consuming alcohol or WARNING drugs. POTENTIAL HAZARD Operator’s performance capability is reduced Operating this ATV after consuming al- by the influence of alcohol or drugs. cohol or drugs. WHAT CAN HAPPEN Could seriously affect your judgment. Could cause you to react more slowly.

  • Page 79: Failure To Inspect The Atv Before Oper

    Pre-operation checks WARNING Always perform the pre-operation checks list- POTENTIAL HAZARD ed on page 5-1 before riding for safety and Operating this ATV with improper tires, proper care of the ATV. or with improper or uneven tire pres- WARNING sure. POTENTIAL HAZARD WHAT CAN HAPPEN Failure to inspect the ATV before oper-...

  • Page 80: How To Avoid The Hazard

    Speed limiter WARNING For riders inexperienced with this model, this Indicates a potential hazard that could model is equipped with a speed limiter in the result in serious injury or death. throttle lever housing. The speed limiter limits the power and top speed of the ATV. Turning Do not operate at speeds too fast for your the adjusting screw in decreases the top skills or the conditions.
  • Page 81 Loading and accessories WARNING As originally equipped, this ATV is not de- POTENTIAL HAZARD signed to carry cargo or tow a trailer. If you Overloading this ATV or carrying or tow- choose to add accessories so that you can ing cargo improperly. carry cargo or tow a trailer, you must use WHAT CAN HAPPEN common sense and good judgment.
  • Page 82 During operation WARNING Always keep your feet on the footboards dur- POTENTIAL HAZARD ing operation. Otherwise your feet may con- Removing hands from handlebars or tact the rear wheels. feet from footboards during operation. WHAT CAN HAPPEN Removing even one hand or foot can re- duce your ability to control the ATV or could cause you to lose your balance and fall off of the ATV.
  • Page 83 Avoid wheelies and jumping. You may lose control of the ATV or overturn. WARNING POTENTIAL HAZARD Attempting wheelies, jumps, and other stunts. WHAT CAN HAPPEN Increases the chance of an accident, in- cluding an overturn. HOW TO AVOID THE HAZARD Never attempt stunts, such as wheelies or jumps.
  • Page 84 Never modify this ATV through improp- er installation or use of accessories. All parts and accessories added to this ve- hicle should be genuine Yamaha or equivalent components designed for use on this ATV and should be installed and used according to instructions. If you have questions, consult an autho- rized ATV dealer.
  • Page 85 Exhaust system The exhaust system on the ATV is very hot during and following operation. To prevent burns, avoid touching the exhaust system. Park the ATV in a place where pedestrians or children are not likely to touch it. WARNING POTENTIAL HAZARD Hot exhaust system.

  • Page 86: Be Careful Where You Ride

    BE CAREFUL WHERE YOU RIDE This ATV is designed for off-road use only. Riding on paved surfaces can cause loss of control. WARNING POTENTIAL HAZARD Operating this ATV on paved surfaces. WHAT CAN HAPPEN ATVs are designed for off-road use only. Paved surfaces may seriously affect handling and control of the ATV, and may cause the vehicle to go out of con-...
  • Page 87 Do not ride on any public road, street, or high- way. Riding on public roads can result in colli- sions with other vehicles. WARNING POTENTIAL HAZARD Operating this ATV on public streets, roads or highways. WHAT CAN HAPPEN You can collide with another vehicle. HOW TO AVOID THE HAZARD Never operate this ATV on any public street, road or highway, even a dirt or...
  • Page 88 Know the terrain where you ride. Ride cau- tiously in unfamiliar areas. Stay alert for holes, rocks, or roots in the terrain, and oth- er hidden hazards which may cause the ATV to upset. WARNING POTENTIAL HAZARD Failure to use extra care when operating this ATV on unfamiliar terrain.
  • Page 89 WARNING POTENTIAL HAZARD Failure to use extra care when operating on excessively rough, slippery or loose terrain. WHAT CAN HAPPEN Could cause loss of traction or vehicle control, which could result in an acci- dent, including an overturn. HOW TO AVOID THE HAZARD Do not operate on excessively rough, slippery or loose terrain until you have learned and practiced the skills neces-...
  • Page 90 When riding in an area where you might not WHAT CAN HAPPEN easily be seen, such as desert terrain, mount You could be in a collision. You could a caution flag on the ATV. DO NOT use the be injured. flag pole bracket as a trailer hitch.
  • Page 91 Select a large, flat area off-road to become fa- With the engine idling, pull the clutch lever to miliar with your ATV. Make sure that this area disengage the clutch and shift into 1st gear, is free of obstacles and other riders. You and then release the parking brake.
  • Page 92 When slowing down or stopping, release the WARNING throttle and apply the brakes smoothly and POTENTIAL HAZARD evenly. As you slow down, shift to a lower Opening the throttle abruptly or releas- gear. Be sure that the engine has sufficiently ing the clutch lever too quickly.

  • Page 93: Turning Your Atv

    TURNING YOUR ATV HOW TO AVOID THE HAZARD To achieve maximum traction while riding Always follow proper procedures for off-road, the two rear wheels are mounted sol- turning as described in this Owner’s idly on one axle and turn together at the same Manual.
  • Page 94 Once you have learned this technique you should be able to perform it at higher speeds or in tighter curves. Improper riding procedures such as abrupt throttle changes, excessive braking, incorrect body movements, or too much speed for the sharpness of the turn may cause the ATV to tip.

  • Page 95: Climbing Uphill

    CLIMBING UPHILL HOW TO AVOID THE HAZARD Use proper riding techniques to avoid vehicle Never operate the ATV on hills too steep overturns on hills. Be sure that you can ma- for the ATV or for your abilities. neuver your ATV well on flat ground before at- Practice on smaller hills before attempt- tempting any incline and then practice riding ing large hills.
  • Page 96 WARNING An obstacle, a sharp drop, or another vehicle or person could be on the other POTENTIAL HAZARD side of the hill. Climbing hills improperly. WHAT CAN HAPPEN Could cause loss of control or cause the ATV to overturn. HOW TO AVOID THE HAZARD Always follow proper procedures for climbing hills as described in this Own- er’s Manual.

  • Page 97: Scribed In The Owner's Manual

    If you are climbing a hill and you find that you When crossing the side of a hill: have not properly judged your ability to make Always follow proper procedures as de- it to the top, you should turn the ATV around scribed in the Owner’s Manual.
  • Page 98 If your ATV has stalled or stopped and you WARNING believe you can continue up the hill, restart POTENTIAL HAZARD carefully to make sure you do not lift the front Stalling, rolling backwards or improper- wheels which could cause you to lose control. ly dismounting while climbing a hill.
  • Page 99 Dismount on uphill side or to a side if pointed straight uphill. Turn the ATV around and remount, following the pro- cedure described in the Owner’s Manu- 7-29...

  • Page 100: Riding Downhill

    RIDING DOWNHILL WARNING When riding your ATV downhill, shift your POTENTIAL HAZARD weight as far to the rear and uphill side of the Going down a hill improperly. ATV as possible. Move back on the seat and WHAT CAN HAPPEN sit with your arms straight.
  • Page 101 7-31...

  • Page 102: Crossing A Slope

    CROSSING A SLOPE WARNING Traversing a sloping surface on your ATV re- POTENTIAL HAZARD quires you to properly position your weight to Improperly crossing hills or turning on maintain proper balance. Be sure that you hills. have learned the basic riding skills on flat WHAT CAN HAPPEN ground before attempting to cross a sloping Could cause loss of control or cause the...
  • Page 103 Avoid hills with excessively slippery or loose surfaces. Shift your weight to the uphill side of the ATV. 7-33...

  • Page 104: Crossing Through Shallow Water

    CROSSING THROUGH SHALLOW WATER Remember that wet brakes may have re- The ATV can be used to cross slow moving, duced stopping ability. Test your brakes shallow water of up to a maximum of 35 cm after leaving water. If necessary, apply (14 inches) in depth.
  • Page 105 Test your brakes after leaving the water. Do CAUTION: not continue to ride your ATV without verifying After riding your ATV in water, be sure to that you have regained proper braking ability. drain the trapped water by removing the check hose at the bottom of the air filter case.

  • Page 106: Riding Over Rough Terrain

    RIDING OVER ROUGH TERRAIN WARNING Riding over rough terrain should be done with POTENTIAL HAZARD caution. Look out for obstacles which could Improperly operating over obstacles. cause damage to the ATV or could lead to an WHAT CAN HAPPEN upset or accident. Be sure to keep your feet Could cause loss of control or a colli- firmly mounted on the footboards at all times.
  • Page 107 7-37...

  • Page 108: Sliding And Skidding

    SLIDING AND SKIDDING If the rear wheels of your ATV start to slide Care should be used when riding on loose or sideways, control can usually be regained (if slippery surfaces since the ATV may slide. If there is room to do so) by steering in the direc- unexpected and uncorrected, sliding could tion of the slide.
  • Page 109 With practice, over a period of time, skill at WARNING controlled sliding can be developed. The ter- POTENTIAL HAZARD rain should be chosen carefully before at- Skidding or sliding improperly. tempting such maneuvers, since both stability WHAT CAN HAPPEN and control are reduced. Bear in mind that You may lose control of this ATV.

  • Page 110: What To Do If

    WHAT TO DO IF ... If your ATV starts to slide sideways: This section is designed to be a reference Steer in the direction of the slide if you have guide only. Be sure to read each section on the room. riding techniques completely.
  • Page 111 If your ATV is traversing a sloping surface: Be sure to ride with your weight positioned towards the uphill side of the ATV to main- tain proper balance. If the ATV starts to tip, steer down the hill (if there are no obstacles in your way) to regain balance.

  • Page 112: Periodic Maintenance And Adjustment

    EBU00515 PERIODIC MAINTENANCE AND Have a Yamaha dealer perform service if ADJUSTMENT you are not familiar with machine ser- vice. Periodic inspection, adjustment and lubrica- tion will keep your machine in the safest and most efficient condition possible. Safety is an EBU01221 obligation of the machine owner.
  • Page 113 HOW TO AVOID THE HAZARD during a service operation requiring one, take Never modify this ATV through improp- your machine to a Yamaha dealer to check er installation or use of accessories. All the torque settings and adjust them as neces- parts and accessories added to this ve- sary.

  • Page 114: Periodic Maintenance/Lubrication

    EBU00261 PERIODIC MAINTENANCE/LUBRICATION INITIAL EVERY ITEM ROUTINE month months months months year • Check valve clearance. Valves* • Adjust if necessary. • Check coolant leakage. Cooling system • Repair if necessary. • Replace coolant every 24 months. • Check condition. Spark plug •...
  • Page 115 • Correct if necessary. • Check operation. Lights and switches* • Adjust headlight beams. Since these items require special tools, data and technical skills, have a Yamaha dealer perform the service. ** Lithium-soap-based grease NOTE: Recommended brake fluid: DOT4 Brake fluid replacement: •...

  • Page 116: Panel Removal And Installation

    EBU00807 EBU01013 Panel removal and installation Panel A 1. Panel A 1. Panel A 2. Bolt (× 2) The panel illustrated needs to be removed to To remove perform some of the maintenance described Remove the bolts, and then take the panel off. in this chapter.

  • Page 117: Engine Oil And Oil Filter Cartridge

    EBU12381 Engine oil and oil filter cartridge 3. Wait a few minutes until the oil settles, re- The engine oil level should be checked before move the engine oil tank filler cap, wipe each ride. In addition, the oil must be changed the dipstick clean with a clean rag, insert and the oil filter cartridge replaced at the inter- it back into the filler hole (without screw-...
  • Page 118 4. If the engine oil is below the minimum To change the engine oil (with or without oil filter cartridge replacement) level mark, add sufficient oil of the recom- mended type to raise it to the correct lev- NOTE: When adding oil, be careful not to overfill the engine oil tank;...
  • Page 119 4. Remove the crankcase engine oil drain bolt. 1. Engine oil tank drain bolt 5. Remove the engine oil tank filler cap and the oil tank drain bolt. 1. Crankcase engine oil drain bolt 6. Check the washers for damage, and re- place if necessary.
  • Page 120 9. Install a new oil filter cartridge with an oil NOTE: filter wrench, and then tighten it to the An oil filter wrench is available at a nearby specified torque with a torque wrench. Yamaha dealer. Tightening torque: Oil filter cartridge: 17 Nm (1.7 m·kgf, 12 ft·lbf)
  • Page 121 10. Install the crankcase engine oil drain bolt Recommended engine oil: and the engine oil tank drain bolt, and See page 10-2. then tighten them to the specified Oil quantity: torques. Periodic oil change: 1.9 L (1.67 Imp qt, 2.01 US qt) Tightening torques: With oil filter cartridge replacement: Crankcase engine oil drain bolt:...

  • Page 122: Cooling System

    EBU10151 15. Start the engine, and then let it idle for Cooling system several minutes while checking it for oil 1. Check the coolant level in the coolant leakage. If oil is leaking, immediately turn reservoir when the engine is cold as the the engine off and check for the cause.

  • Page 123: Changing The Coolant

    Allow any re- maining pressure to escape before NOTE: completely removing the cap. If water is added, have a Yamaha dealer check the antifreeze content of the cool- ant as soon as possible. The radiator fan operation is completely automatic.
  • Page 124 1. Place the ATV on a level surface. 4. Remove the radiator cap. 2. Remove panel A. (See page 8-5 for pan- el removal and installation procedures.) 3. Place a container under the engine, and then remove the coolant drain bolt. 1.
  • Page 125 5. Remove the coolant reservoir cap. Tightening torque: 6. Disconnect the hose on the coolant res- Coolant drain bolt: ervoir side, and then drain the coolant 10 Nm (1.0 m·kgf, 7 ft·lbf) from the coolant reservoir. 9. Install the coolant reservoir hose. 10.

  • Page 126: Spark Plug Inspection

    15. Start the engine and then check for cool- ant leakage. NOTE: If any leakage is found, have a Yamaha deal- er check the cooling system. 16. Install the panel. 8-15...
  • Page 127 ATV that is being ridden normally. Do not attempt to diagnose such problems yourself. Instead, take the ATV to a Yamaha dealer. You should periodically remove and inspect 1. Spark plug wrench the spark plug because heat and deposits will cause the spark plug to slowly break down and erode.
  • Page 128 Installation Tightening torque: 1. Measure the electrode gap with a wire Spark plug: thickness gauge and, if necessary, adjust 17.5 Nm (1.75 m·kgf, 12.7 ft·lbf) the gap to specification. NOTE: Spark plug gap: If a torque wrench is not available when you 0.8–0.9 mm (0.03–0.04 in) are installing a spark plug, a good estimate of the correct torque is 1/4 to 1/2 turn past finger...

  • Page 129: Air Filter Element Cleaning

    EBU01211 Air filter element cleaning NOTE: There is a check hose at the bottom of the air filter case. If dust or water collects in this hose, empty the hose and clean the air filter element and air filter case. 1.
  • Page 130 WARNING POTENTIAL HAZARD Using low flash point solvents or gaso- line to clean the air filter element. WHAT CAN HAPPEN Low flash point solvents or gasoline can catch fire or explode. HOW TO AVOID THE HAZARD Use parts cleaning solvent to clean the 1.
  • Page 131 8. Apply Yamaha foam air filter oil or other 12. Install the seat. quality foam air filter oil to the air filter el- NOTE: ement. If foam air filter oil is not available, The air filter element should be cleaned every engine oil may be used.

  • Page 132: Spark Arrester Cleaning

    EBU00780 Spark arrester cleaning 2. Remove the tailpipe by pulling it out of Be sure the exhaust pipe and muffler are cool the muffler. before cleaning the spark arrester. 3. Tap the tailpipe lightly, then use a wire 1. Remove the bolt. brush to remove any carbon deposits from the spark arrester portion of the tailpipe.

  • Page 133: Carburetor Adjustment

    The carburetor is a vital part of the engine and POTENTIAL HAZARD requires very sophisticated adjustment. Most Improper cleaning of the spark arrester. adjusting should be left to a Yamaha dealer Hot exhaust system who has the professional knowledge and ex- WHAT CAN HAPPEN perience to do so.

  • Page 134: Idle Speed Adjustment

    EBU13020 Idle speed adjustment NOTE: A diagnostic tachometer must be used for this procedure. 1. Start the engine and warm it up for a few minutes at approximately 1,000 to 2,000 r/min. Occasionally rev the engine to 4,000 to 5,000 r/min. The engine is warm when it quickly responds to the 1.

  • Page 135: Valve Clearance Adjustment

    This adjust- ment however, should be left to a professional 1. Loosen the locknut. Yamaha service technician. 2. Turn the adjusting bolt until the throttle le- ver free play is 3–5 mm (0.12–0.20 in). 3. Tighten the locknut.

  • Page 136: Front And Rear Brake Pad Inspection

    If a brake pad is worn to the point that the wear indicator grooves are almost in contact with the disc plate, ask a Yamaha dealer to replace the brake pads as a set. 1. Wear indicator groove Front 1.

  • Page 137: Brake Fluid Level Inspection

    EBU01214 Brake fluid level inspection Rear Insufficient brake fluid may let air enter the brake system, possibly causing the brakes to become ineffective. Before riding, check that the brake fluid is above the minimum level mark and replenish if necessary. A low brake fluid level may indi- cate worn brake pads and/or brake system leakage.

  • Page 138: Brake Fluid Replacement

    1. Brake fluid reservoir cover 2. Bolt (× 2) fluid immediately. Observe these precautions: Have a Yamaha dealer check the cause if When checking the brake fluid level, make the brake fluid level goes down. sure the top of the brake fluid reservoir is level.

  • Page 139: Front Brake Lever Free Play

    The front brake lever should have a free play POTENTIAL HAZARD of zero mm (zero in) at the lever end. If not, Operating with improperly serviced or have a Yamaha dealer check the brake sys- adjusted brakes. tem. WHAT CAN HAPPEN You could lose braking ability, which could lead to an accident.

  • Page 140: Brake Pedal Height Adjustment

    The top of the brake pedal should be posi- POTENTIAL HAZARD tioned 4 mm (0.16 in) below the top of the Operating with improperly serviced or footrest. If not, have a Yamaha dealer adjust adjusted brakes. WHAT CAN HAPPEN You could lose braking ability, which could lead to an accident.

  • Page 141: Parking Brake Adjustment

    A. Cable length If the cable cannot be adjusted to specifica- 1. Fully loosen the locknut and the adjusting tion, consult a Yamaha dealer. bolt at the clutch lever. 4. Tighten the locknut at the clutch lever. 2. Loosen the locknut and the adjusting bolt at the rear brake caliper.
  • Page 142 5. Screw in the adjusting bolt at the rear WARNING brake caliper by hand until it feels tight, POTENTIAL HAZARD then screw it out 1/8 turn. Tighten the Operating with improperly adjusted locknut to the specified torque. brakes. Tightening torque: WHAT CAN HAPPEN Locknut: The brakes could malfunction, causing...

  • Page 143: Adjusting The Rear Brake Light Switch

    EBU00833 EBU00741 Adjusting the rear brake light switch Clutch lever free play adjustment The rear brake light switch, which is activated The clutch lever free play should be adjusted by the brake pedal and brake lever, is proper- to 5–10 mm (0.20–0.39 in). ly adjusted when the brake light comes on just 1.
  • Page 144 6. Loosen the locknut at the crankcase side. 7. Turn the adjusting nut at the crankcase in direction a to increase the free play or in direction b to decrease the free play. 8. Tighten the locknut at the crankcase and the clutch lever.

  • Page 145: Drive Chain Slack Check

    EBU01144 Drive chain slack check NOTE: Move the ATV back and forth and find the tightest position of the drive chain. Check and/ or adjust the chain slack while it is in this tight- est position. To check the drive chain slack, all tires must be touching the ground and there should be no weight on it.

  • Page 146: Drive Chain Slack Adjustment

    EBU01194 NOTE: Drive chain slack adjustment There are alignment marks on each side of 1. Loosen the rear wheel hub upper and the swingarm and on the hub. Use them to lower nuts. check for proper wheel axle alignment. 1. Upper wheel hub nut 2.

  • Page 147: Lubricating The Drive Chain

    EBU00805 Lubricating the drive chain Tightening torques: The drive chain must be cleaned and lubricat- Locknut: ed at the intervals specified in the periodic 16 Nm (1.6 m·kgf, 12 ft·lbf) maintenance and lubrication chart, otherwise Upper wheel hub nut: it will quickly wear out, especially when riding 90 Nm (9.0 m·kgf, 65 ft·lbf) in dusty or wet areas.

  • Page 148: Cable Inspection And Lubrication

    EBU00356 1. Clean the drive chain with kerosene and Cable inspection and lubrication a small soft brush. WARNING POTENTIAL HAZARD CAUTION: Damaged control cables. To prevent damaging the O-rings, do not WHAT CAN HAPPEN clean the drive chain with steam cleaners, Corrosion can result when the outer high-pressure washers or inappropriate covering of control cables becomes...

  • Page 149: Brake And Shift Pedal/Brake And Clutch Lever Lubrication

    If the cables do not operate smoothly, ask a Yamaha dealer to replace them. Lubricate the pivoting parts of each lever and pedal. Recommended lubricant: Yamaha chain and cable lube or Recommended lubricant: SAE 10W30 motor oil Lithium-soap-based grease (all-purpose grease)

  • Page 150: Front Upper And Lower Arm Pivot Lubrication

    EBU01018 Front upper and lower arm pivot Right side lubrication Lubricate the upper and lower arm pivots. Recommended lubricant: Lithium-soap-based grease Left side 1. Upper grease nipple 2. Lower grease nipple (× 2) 1. Upper grease nipple 2. Lower grease nipple (× 2) 8-39...

  • Page 151: Rear Arm Pivot Lubrication

    EBU00987 Rear arm pivot lubrication Lubricate the rear arm pivots. Recommended lubricant: Lithium-soap-based grease 1. Grease nipple 1. Grease nipple 8-40...

  • Page 152: Wheel Removal

    EBU01112 Wheel removal Rear 1. Loosen the wheel nuts. 2. Elevate the ATV and place a suitable stand under the frame. 3. Remove the nuts from the wheel. 4. Remove the wheel. Front 1. Nut (× 4) 1. Nut (× 4) 8-41...

  • Page 153: Wheel Installation

    EBU00782 Wheel installation Rear When installing a wheel, reverse the removal procedure. NOTE: When installing a front wheel, the arrow mark on the tire must point toward the rotating direction of the wheel. When installing a rear wheel, the wording on the tire “SIDE FACING OUTWARDS”...

  • Page 154: Battery

    Keep out of reach of chil- tery. If the battery seems to have discharged, dren. consult a Yamaha dealer. Antidote: EXTERNAL: Flush with water. CAUTION: INTERNAL: Drink large quantities of wa- Do not try to remove the sealing caps of ter or milk.

  • Page 155: Battery Maintenance

    Then turn on the switch- es. If the fuse immediately blows again, CAUTION: consult a Yamaha dealer. A special battery charger (constant volt- Specified fuse: 20 A age/ampere or constant voltage) is re-...

  • Page 156: Replacing A Headlight Bulb

    EBU12151 Replacing a headlight bulb WARNING If a headlight bulb burns out, replace the bulb POTENTIAL HAZARD as follows. Using an improper fuse. 1. Remove the headlight assembly by re- WHAT CAN HAPPEN moving the bolts. An improper fuse can cause damage to the electrical system which could lead to a fire.
  • Page 157 2. Disconnect the headlight coupler. 3. Remove the screw. 1. Headlight coupler 1. Screw 4. Remove the headlight cover from the headlight assembly. 8-46...
  • Page 158 NOTE: 5. Remove the screw and pull the headlight Pull outward on the rear of the headlight unit, unit out from its case. and then pull outward on the front. 6. Remove the headlight bulb holder cover. 1. Screw 1. Headlight bulb holder cover 8-47...
  • Page 159 7. Push the headlight bulb holder inward, WARNING turn it counterclockwise and remove the POTENTIAL HAZARD defective bulb. A headlight bulb is hot when it is on and immediately after it is turned off. WHAT CAN HAPPEN You can be burned, or a fire could start if the bulb touches something flamma- ble.
  • Page 160 8. Put a new headlight bulb into position and secure it in place with the bulb holder. 1. Do not touch the glass part of the bulb. CAUTION: 1. Headlight bulb 2. Headlight bulb holder Do not touch the glass part of the head- light bulb to keep it free from oil, otherwise the transparency of the glass, the luminos- ity of the bulb, and the bulb life will be ad-...
  • Page 161 Make sure the headlight bulb holder cover inal position, and then install the bolts. is securely fitted over the bulb holder and 14. Have a Yamaha dealer adjust the head- seated against the reflector. light beam if necessary. 10. Align the projections on the headlight unit with the holders, install the headlight unit into the case, and then install the screw.

  • Page 162: Tail/Brake Light Bulb Replacement

    EBU01217 Tail/brake light bulb replacement 1. Remove the lens by removing the screws. 1. Bulb 3. Install a new bulb by pushing it inward and turning it clockwise. 4. Install the lens by installing the screws. 1. Lens 2. Screw (× 2) 2.

  • Page 163: Troubleshooting

    EBU00412 Troubleshooting WARNING Although Yamaha machines receive a rigid in- POTENTIAL HAZARD spection before shipment from the factory, Checking the fuel system while smok- trouble may occur during operation. Any prob- ing or near an open flame. lem in the fuel, compression, or ignition sys-...

  • Page 164: Troubleshooting Charts

    No fuel. 2. Compression There is compression. Compression normal. Use the electric starter to see if there is compression. Ask a Yamaha dealer to No compression. inspect. 3. Ignition Wipe clean with dry cloth. Ignition system is Spark is good.

  • Page 165: Engine Overheating

    Restart the engine. If the engine overheats again, ask a Level is OK. Yamaha dealer to inspect and/or repair the cooling system. NOTE: If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is changed to the recommended coolant as soon as possible.

  • Page 166: Cleaning And Storage

    EBU00417 CLEANING AND STORAGE CAUTION: Excessive water pressure may cause wa- A. CLEANING ter seepage and deterioration of wheel Frequent, thorough cleaning of your machine bearings, brakes, transmission seals and will not only enhance its appearance but will electrical devices. Many expensive repair improve its general performance and extend bills have resulted from improper high the useful life of many components.
  • Page 167 7. Clean the seat with a vinyl upholstery WARNING cleaner to keep the cover pliable and POTENTIAL HAZARD glossy. Operation with wet brakes after wash- 8. Automotive type wax may be applied to ing. all painted and chrome plated surfaces. WHAT CAN HAPPEN Avoid combination cleaner-waxes.

  • Page 168: Storage

    Do not apply oil to NOTE: any rubber parts or the seat cover. Use of fuel stabilizer and conditioner elimi- nates the need to drain the fuel system. Con- sult a Yamaha dealer if the fuel system needs to be drained instead.
  • Page 169 8. Remove the battery and charge it. Store it in a dry place and recharge it once a month. Do not store the battery in an ex- cessively warm or cold place (less than 0 °C (30 °F) or more than 30 °C (90 °F)). NOTE: Make any necessary repairs before storing the machine.

  • Page 170: Specifications

    EBU00428 SPECIFICATIONS MODEL YFM660R Dimension: Overall length 1,830 mm ( 72 in) Overall width 1,100 mm ( 43.3 in) Overall height 1,150 mm ( 45.3 in) Seat height 860 mm ( 33.9 in) Wheel base 1,245 mm ( 49 in) Ground clearance 265 mm ( 10.4 in) Minimum turning radius...
  • Page 171 MODEL YFM660R Engine oil: 0˚ 10˚ 30˚ 70˚ 90˚ 110˚ 130˚F 50˚ Type YAMALUBE 4 (20W40) or SAE 20W40 YAMALUBE 4 (10W30) or SAE 10W30 SAE 5W30 -20˚ 30˚ 40˚ 50˚C -10˚ 0˚ 10˚ 20˚ Recommended engine oil classification: API Service SE, SF, SG type or higher CAUTION: In order to prevent clutch slippage (since the en- gine oil also lubricates the clutch), do not mix any...
  • Page 172 MODEL YFM660R Radiator capacity (including all routes): 1.3 L (1.14 lmp qt, 1.37 US qt) Air filter: Wet element Fuel: Type UNLEADED GASOLINE ONLY Tank capacity 12 L (2.64 Imp gal, 3.17 US gal) Reserve amount 2.6 L (0.57 Imp gal, 0.69 US gal) Carburetor: Type ×...
  • Page 173 MODEL YFM660R Gear ratio: 31/12 (2.583) 30/18 (1.667) 27/21 (1.286) 22/21 (1.048) 19/21 (0.905) 23/16 × 28/23 (1.750) Reverse Chassis: Frame type Steel tube ° Caster angle Trail 47 mm (1.85 in) Tire: Type Tubeless AT21 × 7 - 10 Size: Front AT20 ×...
  • Page 174 MODEL YFM660R Wheel travel: Front 230 mm (9.06 in) Rear 220 mm (8.66 in) Electrical: Ignition system DC-C.D.I. Generator system A.C. magneto Battery type/voltage capacity YTX14-BS/12 V, 12 Ah Headlight type: Krypton bulb Bulb voltage, wattage × quantity: 12V, 30 W/30 W × 2 Headlight 12V, 5 W/21 W ×...

  • Page 175: Noise Regulation

    EBU00430 NOISE REGULATION TAMPERING WITH NOISE CONTROL SYSTEM PROHIBITED: Federal law prohibits the following acts or the causing thereof: (1) The removal or rendering inop- erative by any person other than for purposes of maintenance, repair, or replacement of any de- vice or element of design incorporated into any new vehicle for the purpose of noise control prior to its sale or delivery to the ultimate purchaser or while it is in use or (2) the use of the vehicle after such device or element of design has been removed or rendered inoperative by any person.

  • Page 176: Maintenance Record

    EBU13651 M AINTENANCE RECORD Copies of work orders and/or receipts for parts you purchase and install will be required to docu- ment maintenance done in accordance with the warranty. The chart below is printed only as a re- minder to you that the maintenance work is required. It is not acceptable proof of maintenance work.

  • Page 177: Atv Limited Warranty

    EBU00432 YAMAHA MOTOR CORPORATION, U.S.A. ATV LIMITED WARRANTY 13-1...
  • Page 178 13-2...

  • Page 179: Yamaha Extended Service (Y.e.s.)

    EBU00435 YAMAHA EXTENDED SERVICE (Y.E.S.) 14-1...
  • Page 180 14-2...
  • Page 181 EBU00436 WARNING Indicates a potential hazard that could result in serious injury or death. 14-3...
  • Page 182 EBU00437 14-5...
  • Page 183 LOCATE AND READ OWNER’S MANUAL. FOLLOW ALL INSTRUCTIONS AND WARNINGS. (For replacement manual, call 1-800-532-1558) YAMAHA MOTOR CO., LTD. PRINTED ON RECYCLED PAPER PRINTED IN JAPAN 2003.03-4.1×1 CR...

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