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EAS20450
PERIODIC MAINTENANCE
EAS20460
INTRODUCTION
This chapter includes all information necessary to perform recommended checks and adjustments. If
followed, these preventive maintenance procedures will ensure more reliable vehicle operation, a long-
er service life and reduce the need for costly overhaul work. This information applies to vehicles already
in service as well as to new vehicles that are being prepared for sale. All service technicians should be
familiar with this entire chapter.
EBU21745
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM
TIP
• For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.
• For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance in-
tervals. However, keep in mind that if the ATV isn't used for a long period of time, the month mainte-
nance intervals should still be followed.
• Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools,
data and technical skills.
NO.
ITEM
1
*
Fuel line
2
Spark plug
3
*
Valves
4
*
Fuel injection
Crankcase breather
5
*
system
6
*
Exhaust system
7
Spark arrester
8
*
Air induction system
EBU21868
GENERAL MAINTENANCE AND LUBRICATION CHART
TIP
• For ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.
• For ATVs equipped with an odometer or an hour meter, follow the km (mi) or hours maintenance in-
tervals. However, keep in mind that if the ATV isn't used for a long period of time, the month mainte-
nance intervals should still be followed.
• Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools,
data and technical skills.
CHECK OR MAINTENANCE
JOB
• Check fuel hoses for cracks or other damage, and re-
place if necessary.
• Check condition and clean, regap, or replace if nec-
essary.
• Check valve clearance and adjust if necessary.
• Check and adjust engine idle speed.
• Check breather hose for cracks or other damage,
and replace if necessary.
• Check for leakage and replace gasket(s) if neces-
sary.
• Check for looseness and tighten all screw clamps
and joints if necessary.
• Clean.
• Check the air cut-off valve, reed valve, and hose for
damage.
• Replace any damaged parts if necessary.
3-1
PERIODIC MAINTENANCE
month
1
Whichever
320
comes first
km (mi)
(200)
hours
20
√
√
√
√
INITIAL
EVERY
3
6
6
12
1300
2500
2500
5000
(800)
(1600)
(1600)
(3200)
80
160
160
320
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
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