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Yamaha YZ250F User Manual

Yamaha YZ250F
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Page #261 background image
CRANKSHAFT ASSEMBLY AND BALANCER SHAFT
5-68
EAS1SM5288
INSTALLING THE CRANKSHAFT ASSEM-
BLY
1. Install:
Crankshaft assembly
TIP
Install the crankshaft assembly with the crank-
shaft installer pot “1”, crankshaft installer bolt
“2”, adapter (M12) “3” and spacer “4”.
ECA13970
NOTICE
To avoid scratching the crankshaft and to
ease the installation procedure, lubricate
the oil seal lips with lithium-soap-based
grease.
In order to prevent the crankshaft seizure,
apply molybdenum disulfide grease.
TIP
Hold the connecting rod at top dead center
(TDC) with one hand while turning the nut of the
crankshaft installer bolt with the other. Turn the
crankshaft installer bolt until the crankshaft as-
sembly bottoms against the bearing.
EAS1SM5289
INSTALLING THE BALANCER SHAFT
1. Install:
Balancer shaft “1”
TIP
Apply the molybdenum grease to the part “a”
where the balancer shaft fit into the bearing.
ECA13970
NOTICE
Do not apply the molybdenum grease to the
balancer shaft thread.
Crankshaft installer pot
90890-01274
Installing pot
YU-90058
Crankshaft installer bolt
90890-01275
Bolts
YU-90060
Adapter (M12)
90890-01278
Adapter #3
YU-90063
Spacer (crankshaft installer)
90890-04081
Pot spacer
YM-91044
M
1
a

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Yamaha YZ250F Specifications

General IconGeneral
BrandYamaha
ModelYZ250F
CategoryMotorcycle
LanguageEnglish

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