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3-1
MAINTENANCE INTERVALS
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS
•The following schedule is intended as a general guide to maintenance and lubrication. Bear in mind
that such factors as weather, terrain, geographical location, and individual usage will alter the re-
quired maintenance and lubrication intervals. If you are a doubt as to what intervals to follow in
maintaining and lubricating your machine, consult your Yamaha dealer.
•Periodic inspection is essential in making full use of the machine performance. The service life of
the parts varies substantially 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.
Item
After
break-in
Every
race
(about
2.5
hours)
Every
third
(about
7.5
hours)
Every
fifth
(about
12.5
hours)
As re-
quired
Remarks
ENGINE OIL
Replace ●●
VALVES
Check the valve
clearances
●● The engine must be cold.
Inspect ● Check the valve seats
and valve stems for
wear.
Replace ●
VALVE SPRINGS
Inspect ● Check the free length
and the tilt.
Replace ●
VALVE LIFTERS
Inspect ● Check for scratches and
wear.
Replace ●
CAMSHAFTS Inspect the camshaft sur-
face.
Inspect ● Inspect the decompres-
sion system.
Replace ●
CAMSHAFT SPROCK-
ETS
Inspect ● Check for wear on the
teeth and for damage.
Replace ●