Checking The Primary Driven Gear; Installing The Oil Seal; Installing The Right Crankcase Cover; Installing The Clutch - Yamaha YZ450FX 2019 Owner's Service Manual

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"
New
• Washer "2"
• Circlip "3"
New
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.
LS
EAM30120
INSTALLING THE RIGHT CRANKCASE
COVER
1. Install:
• Dowel pin "1"
• O-ring "2"
New
• Collar "3"
• Gasket "4"
New
TIP
Apply the lithium-soap-based grease on the O-
ring.
1 1
2. Install:
• Right crankcase cover "1"
• Right crankcase cover bolt "2"
TIP
• Apply the engine oil on the impeller shaft end.
• When installing the crankcase cover onto the
crankcase, make sure that the impeller shaft
end "3" aligns with the balancer end slot "4".
• Tighten the right crankcase cover bolts in stag-
es and in a crisscross pattern.
3
2
1
EAM30121

INSTALLING THE CLUTCH

1. Install:
• Push lever shaft "1"
TIP
• Apply the lithium-soap-based grease on the oil
seal lip.
• Before installation, apply the engine oil to the
5-45
CLUTCH
2 2
1 1
Right crankcase cover bolt
10 N·m (1.0 kgf·m, 7.4 lb·ft)
3 3
4 4
2 2
1 1