Gaskets, Oil Seals And O-Rings; Lock Washers/Plates And Cotter Pins; Bearings And Oil Seals; Circlips - Yamaha 2009 YFM25RY Service Manual

EAS20210

GASKETS, OIL SEALS AND O-RINGS

1. When overhauling the engine, replace all
gaskets, seals and O-rings. All gasket sur-
faces, oil seal lips and O-rings must be
cleaned.
2. During reassembly, properly oil all mating
parts and bearings and lubricate the oil
seal lips with grease.
1. Oil
2. Lip
3. Spring
4. Grease
EAS20220
LOCK WASHERS/PLATES AND COTTER
PINS
After removal, replace all lock washers/plates
"1" and cotter pins. After the bolt or nut has
been tightened to specification, bend the lock
tabs along a flat of the bolt or nut.
EAS20230

BEARINGS AND OIL SEALS

Install bearings and oil seals so that the manu-
facturer's marks or numbers are visible. When
installing oil seals "1", lubricate the oil seal lips
with a light coat of lithium-soap-based grease.
Oil bearings liberally when installing, if appro-
priate.
IMPORTANT INFORMATION
ECA13300
Do not spin the bearing with compressed
air because this will damage the bearing
surfaces.
EAS20240

CIRCLIPS

Before reassembly, check all circlips carefully
and replace damaged or distorted circlips.
Always replace piston pin clips after one use.
When installing a circlip "1", make sure the
sharp-edged corner "2" is positioned opposite
the thrust "3" that the circlip receives.
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