Yamaha YZ 2019 Series, Owner'S Service Manual, Page: 243 / 398

CLUTCH
5-44
the primary drive and primary driven gears as
a set.
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.
EAM30118
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

Replace
the primary drive and primary driven gears as
a set.
EAM30119
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.
EAM30120
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 stag-
es 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
.
.