3 - 1
INSP
ADJ
MAINTENANCE INTERVALS
EC300000
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
required 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.
ItemAfter
break-inEvery
raceEvery
third
raceEvery
fifth
raceAs re-
quiredRemarks
PISTON
Inspect and clean
Replace
ll
l
lInspect crack
Remove carbon
PISTON RING
Inspect
Replace
ll
llCheck ring end gap
PISTON PIN, SMALL END BEARING
Inspect
Replace
l
l
CYLINDER HEAD
Inspect and clean
Retighten
l
ll
lRemove carbon
Check gasket
CYLINDER
Inspect and clean
Replace
ll
lInspect score marks
Inspect wear
CLUTCH
Inspect and adjust
Replace
ll
l
Inspect housing, friction
plate, clutch plate and
spring
TRANSMISSION
Replace oil
Inspect
Replace bearing
ll
l
lYamalube 4 (10W-30) or
SAE 10W-30 SE motor oil
SHIFT FORK, SHIFT CAM, GUIDE BAR
Inspect
l Inspect wear
ROTOR NUT
Retighten
l
l
KICK SHAFT
Inspect idle gear
Replace
l
l
EXHAUST PIPE, SILENCER
Inspect
Clean
ll
l
CRANK
Inspect and clean
ll
CARBURETOR
Inspect, adjust and clean
ll
SPARK PLUG
Inspect and clean
Replace
ll
l
DRIVE CHAIN
Lubricate, slack, alignment
Replace
ll
lChain slack: 35 ~ 45 mm
(1.4 ~ 1.8 in)
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