Maintenance Intervals For Competition Use - Yamaha WR250F Owner's Service Manual

MAINTENANCE INTERVALS FOR COMPETITION USE

EAS2GB2080
TIP
• 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
ENGINE OIL
Replace
VALVES
Check the valve
clearances
Inspect
Replace
VALVE SPRINGS
Inspect
Replace
VALVE LIFTERS
Inspect
Replace
CAMSHAFTS
Inspect
Replace
CAMSHAFT
SPROCKETS
Inspect
Replace
PISTON
Inspect
Clean
Replace
PISTON RING
Inspect
Replace
Every
After third
Every
break- (or
race
in 500
km)
PERIODIC MAINTENANCE
Every
fifth
As re-
(or
quired
1,000
km)
3-4
Remarks
The engine must be cold.
Check the valve seats and
valve stems for wear.
Check the free length and the
tilt.
Check for scratches and wear.
Inspect the camshaft surface.
Inspect the decompression
system.
Check for wear on the teeth
and for damage.
Inspect crack.
Inspect carbon deposits and
eliminate them.
It is recommended that the pis-
ton pin and ring are also re-
placed at the same time.
Check ring end gap.