Yamaha YZ450FF 1SL-28199-11 Owner's Service Manual page 86

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)
3-2
MAINTENANCE INTERVALS
Every
fifth
As re-
(about
quired
12.5
hours)
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.
Remarks