How To Use This Manual; Manual Format - Yamaha F50A Service Manual
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Also See for F50A:
- Owner's manual (117 pages) ,
- Owner's manual (220 pages) ,
- Owner's manual (222 pages)
Table of Contents
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GEN
INFO
How to use this manual
Manual format
The format of this manual has been designed to make service procedures clear and easy to under-
stand. Use the information below as a guide for effective and quality service.
1 Parts are shown and detailed in an exploded diagram and are listed in the components list.
2 Tightening torque specifications are provided in the components list at the beginning of each
section and after a numbered step with tightening instructions.
3 Symbols are used to indicate important aspects of a procedure, such as the grade of lubricant
and lubrication point.
4 The components list consist of parts and part quantities, as well as bolt and screw dimensions.
5 Service points regarding removal, checking, and installation are shown in individual illustrations
to explain the relevant procedure.
6 This service manual has two types of special service tools. Use part numbers that start with "J-",
"YB-", "YM-", "YS-", "YU-", "YW-", or "YX-" for USA and Canada. Use parts numbers that start
with "90890-" for all other countries.
POWR
Power unit
Cylinder head
5-35
1-1
General information
62Y1A11
No.
Part name
Q'ty
Remarks
1
Cylinder head
1
2
Oil
p
um
p
1
3
Cylinder head cover
1
M6 × 20 mm
4
Bolt
7
5
Cylinder head cover
1
Not reusable
gasket
M9 × 95 mm
6
Bolt
10
7
Spark plug
4
M6 × 25 mm
8
Bolt
5
9
Dowel pin
2
10
Cylinder head gasket
1
Not reusable
11
Grommet
4
12
Anode
4
13
Cover
4
14
Bolt
4
15
Cover
4
POWR
16
Bolt
4
Power unit
17
O-ring
1
Not reusable
Removing the timing belt and
18
O-ring
1
Not reusable
sprockets
19
O-ring
1
Not reusable
1. Set the cylinder #1 piston position to
M6 × 40 mm
20
Bolt
4
TDC of the compression stroke by align-
21
Housing
1
ing the "1" mark a on the driven sprocket
with the " " mark b on the cylinder
22
Drive shaft
1
head.
23
Pin
1
24
Inner rotor
1
25
Outer rotor
1
26
Gasket
1
Not reusable
27
Cover
1
M6 × 20 mm
28
Screw
2
È Tightening sequence
CAUTION:
Do not turn the drive sprocket counter-
clockwise, otherwise the valve system
may be damaged.
2. Remove the breather hose and loosen
the drive sprocket nut 1.
62Y1A11
NOTE:
• Use a deep socket 2 (M42) for this proce-
dure.
• Do not turn the camshaft when loosening
the drive sprocket nut.
Crankshaft holder 3: YB-06562
Crankshaft holder 18 3: 90890-06562
5-31
Cylinder head
Tightening torques
Stage N·m kgf·m
ft·lb
1st
23
2.3
17
2nd
47
4.7
34
18
1.8
13
1st
6
0.6
4.3
2nd
12
1.2
8.7
3. Remove the tensioner 4 and timing belt
5
5 from the driven sprocket side.
4. Loosen the driven sprocket bolt 6 and
5-36
remove the driven sprocket
.
È For USA and Canada
É For worldwide
NOTE:
Do not turn the camshaft when loosening the
driven sprocket bolt.
Flywheel magnet holder: YB-06139
Flywheel holder: 90890-06522
62Y1A11
62Y3A11
1
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Chapters
Table of Contents
Troubleshooting
