Yamaha YZ 2018 Series, Owner'S Service Manual

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CLUTCH
5-44
2. Check:
• Primary-drive-gear-to-primary-driven-gear
free play
Free play exists

Replace the primary
drive and primary driven gears as a set.
EASB29B249
CHECKING THE PRIMARY DRIVEN GEAR
1. Check:
• Primary driven gear
Damage/wear

Replace the primary drive
and primary driven gears as a set.
Excessive noise during operation

Re-
place the primary drive and primary driven
gears as a set.
EASB29B250
INSTALLING THE OIL SEAL
1. Install:
• Oil seal “1”
• Washer “2”
• Circlip “3”
TIP
• Apply the lithium-soap-based grease on the
oil seal lip.
• Install the oil seal in parallel with its manufac-
ture's marks or numbers facing inward.
EASB29B251
INSTALLING THE RIGHT CRANKCASE
COVER
1. Install:
• Dowel pin “1”
• O-ring “2”
• Collar “3”
• Gasket “4”
TIP
Apply the lithium-soap-based grease on the O-
ring.
2. Install:
• Right crankcase cover “1”
• Right crankcase cover bolt “2”
TIP
• Apply the engine oil on the impeller shaft end.
• Mesh the impeller shaft gear “3” with primary
drive gear “4”.
• Tighten the right crankcase cover bolts in
stages and in a crisscross pattern.
New
New
3
2
1
LS
New
New
Right crankcase cover bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
1
1
3
2
4
LS
T
R
.
.
3
1
4
E