Yamaha YZ 2018 Series, Owner'S Service Manual

Page: 88 / 402

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