Gaskets, Oil Seals And O-Rings; Lock Washers/Plates And Cotter Pins; Bearings And Oil Seals; Circlips - Yamaha YZ450FF 1SL-28199-11 Owner's Service Manual

GASKETS, OIL SEALS AND O-RINGS

EAS1SL5026
1. When overhauling the engine, replace all
gaskets and O-rings. All gasket surfaces, oil
seal lips, and O-rings must be cleaned so
that there may be no dust on them.
2. During assembly, always apply proper oil to
bearings and proper grease to oil seal lips
before installation.
1. Oil
2. Lip
3. Spring
4. Grease
EAS1SL5027 LOCK WASHERS/PLATES AND COTTER
PINS
After removal, replace lock washers/plates "1"
and cotter pins with new ones. After the bolt or
nut has been tightened to specification, firmly
bend the lock tabs along a flat of the bolt or nut.
IMPORTANT INFORMATION

BEARINGS AND OIL SEALS

EAS1SL5028
Install bearings "1" and oil seals "2" with their
manufacturer's marks or size symbols facing
outward. During installation of an oil seal, make
sure that its main lip faces the oil chamber (the
target to be sealed). Before installation, always
apply a light coat of grease to the oil seal lip.
ECA13300
NOTICE
Do not spin the bearing with compressed air
because this will damage the bearing sur-
faces.

CIRCLIPS

EAS1SL5029
When assembling parts, always use new cir-
clips. During installation of a circlip, make sure
that the edge "2" of the circlip "1" is positioned
opposite to the force "3" that the circlip re-
ceives. Install the circlip with its end aligned
with the center of the spline, without opening
the circlip more than necessary.
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