Yamaha WR250F(W), Owner'S Service Manual

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INSP
ADJ
MAINTENANCE INTERVALS
EC300000
REGULAR INSPECTION AND ADJUSTMENTS
MAINTENANCE INTERVALS
NOTE:
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.
Item
After
break-in
Every
race
Every third
(or
500 km)
Every fifth
(or
1,000 km)
As
required
Remarks
ENGINE OIL
Replace
VALVES
Check the valve clearances The engine must be cold.
Check the valve seats and
valve stems for wear.
Inspect
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
surface.
Inspect the decompression
system.
Inspect
Replace
CAMSHAFT SPROCKETS
Inspect Check for wear on the teeth
and for damage.
Replace
PISTON
Inspect Inspect crack
Inspect carbon deposits and
eliminate them.
Clean
Replace
PISTON RING
Inspect Check ring end gap
Replace
PISTON PIN
Inspect
Replace
CYLINDER HEAD Inspect carbon deposits and
eliminate them.
Change gasket
Inspect and clean
CYLINDER
Inspect and clean Inspect score marks
Inspect wear
Replace
CLUTCH
Inspect and adjust Inspect housing, friction
plate, clutch plate and spring
Replace
TRANSMISSION
Inspect
Replace bearing
SHIFT FORK, SHIFT CAM, GUIDE BAR
Inspect Inspect wear