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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
• Check the valve clearances.
• Check the valve seats and the
1 * Valve
• Replace.
• Check the free length.
2 * Valve spring
• Replace.
• Check for scratches and wear.
3 * Valve lifter
• Replace.
• Inspect the camshaft surface.
• Inspect the decompression sys-
4 * Camshaft
• Replace.
• Check for damage and sticking.
5 * Timing chain
• Replace the timing chain and tim-
• Replace the timing chain and tim-
Timing chain ten-
6 *
sioner
• Check for wear on the teeth and
7 * Camshaft sprocket
• Replace.
• Inspect crack.
• Inspect carbon deposits and elim-
8 * Piston
• Replace the piston, piston pin,
• Check the end gap of the piston
9 * Piston ring
• Replace the piston, piston pin,
• Inspect.
10 * Piston pin
• Replace the piston, piston pin,
Routine
valve faces for wear.
tem.
ing chain tensioner as a set.
ing chain tensioner as a set.
for damage.
inate them.
piston pin clip, and piston ring all
as a set.
ring.
piston pin clip, and piston ring all
as a set.
piston pin clip, and piston ring all
as a set.
MAINTENANCE INTERVALS
Every
After
race
third race
break-in
(about 2.5
(about 7.5
hours)
3-1
Every
Every
fifth race
As
(about 12.5
required
hours)
hours)
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