Yamaha YZ 2018 Series, Owner'S Service Manual

Page: 89 / 402

MAINTENANCE INTERVALS
3-3
NUT (ROTOR)
Retighten
✓ ✓
Check for tightening torques.
EXHAUST PIPE, SI-
LENCER,
PROTECTOR
Inspect and re-
tighten
✓ ✓
Check for exhaust leaks, and
tightening torques.
Clean
✓
Replace fiver
✓ ✓
*
* When the exhaust sound be-
comes louder or when a per-
formance drop is felt.
CRANKSHAFT
Inspect and clean
✓ ✓
THROTTLE BODY
Inspect
✓
AIR FILTER
Clean and lubri-
cate
✓ ✓
Use foam air-filter oil or equiv-
alent oil.
Replace
✓
BREATHER
SYSTEM
Inspect
✓
Check ventilation hose for
cracks or damage and drain
any deposits.
Replace
✓
Every two years
SPARK PLUG
Inspect and clean
✓ ✓
Check the electrodes and the
terminals for wear.
Replace
✓
COOLING SYSTEM
Check coolant lev-
el and leakage
✓ ✓
Check radiator cap
operation
✓
Use the radiator cap tester for
a checkup.
Check radiator cap
attached
✓ ✓
Change the cool-
ant
✓
Every two years
Inspect hoses
✓
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