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EAM20157
MAINTENANCE INTERVALS
EAM30369
MAINTENANCE INTERVALS
ECA25871
NOTICE
• After a break-in or before each race, always check the points shown in "TORQUE-CHECK
POINTS" for tightening torques and retighten them.
• Periodic inspection is essential in making full use of the machine performance. The life of
parts varies significantly according to the environment in which the machine runs (e.g., rain,
dirt, etc.). Therefore, earlier inspection is required by reference to the list below.
TIP
Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools,
data and technical skills.
No.
Item
1 * Piston
2 * Piston rings
3 * Piston pin and small
end bearing
4 * Cylinder head
5 * Cylinder
6 * YPVS
7 * Clutch
8 * Transmission
9 * Shift forks, guide
bars, shift cam
Routine
• Check piston for carbon deposits
and cracks or damage.
• Clean.
• Replace.
• Check piston ring end gap and
rings for damage.
• Replace.
• Check piston pin and small end
bearing for damage.
• Replace.
• Check cylinder head for carbon
deposits.
• Clean.
• Check cylinder head gasket for
damage.
• Tighten cylinder head nuts if nec-
essary.
• Replace cylinder head gasket.
• Check cylinder for score marks or
wear.
• Clean.
• Replace.
• Check YPVS for carbon deposits
and cracks or damage.
• Clean.
• Check clutch housing, friction
plates, clutch plates and clutch
springs for wear or damage.
• Adjust.
• Replace.
• Change the transmission oil.
• Check transmission for damage.
• Replace bearings.
• Check all parts for wear and dam-
age.
• Replace if necessary.
MAINTENANCE INTERVALS
Every
After
race
break-in
(about 2.5
hours)
3-1
Every
Every
third race
fifth race
(about 7.5
(about 12.5
hours)
hours)
As
required
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