Yamaha YZ250F Owner's Service Manual page 88

ITEM
PISTON RING
Inspect
Replace
PISTON PIN
Inspect
Replace
CYLINDER HEAD
Inspect and clean
CYLINDER
Inspect and clean
Replace
ENGINE OIL
Inspect
Replace
OIL FILTER ELE-
MENT
Replace
OIL STRAINER
Clean
CLUTCH
Inspect and adjust
Replace
TRANSMISSION
Inspect
Replace bearings
SHIFT FORK, SHIFT
CAM, GUIDE BAR
Inspect
Every Every
After race third
break- (about (about
in 2.5 7.5
hours) hours)
MAINTENANCE INTERVALS
Every
fifth
As re-
(about
quired
12.5
hours)
3-2
Remarks
Check the end gap of the pis-
ton ring.
Replace the piston, piston pin,
piston pin clip, and piston ring
all as a set.
Replace the piston, piston pin,
piston pin clip, and piston ring
all as a set.
Check the coolant passages
for corrosion.
Inspect carbon deposits and
eliminate them.
Check for warpage, and re-
place the gasket.
Inspect score marks.
Inspect wear.
Check the engine oil amount.
Inspect housing, friction plate,
clutch plate and spring.
Inspect wear.