Assembling The Crankshaft; Installing The Crankshaft Assembly - Yamaha YBR250 2007 Service Manual

CRANKSHAFT AND CRANKCASES
3
1
2
1
4
3. Check:
• timing chain guide
(intake side)
Damage/Wear

ASSEMBLING THE CRANKSHAFT

1. Install:
• compression spring 1
• plunger seal 2
• lock pin 3
2. Check:
• plunger seal operation

INSTALLING THE CRANKSHAFT ASSEMBLY

1. Install:
• crankshaft assembly 1
NOTE:
Install the crankshaft
crankshaft installer kit.
2
3
CAUTION:
To prevent scratching the crankshaft and ease
the installation procedure, lubricate the oil seal
lips with lithium-soap-based grease, and then
lubricate the bearings with engine oil.
NOTE:
Hold the connecting rod at the top dead center
(TDC) with one hand while turning the nut onto the
crankshaft installer bolt with the other hand. Turn
the crankshaft installer bolt until its lower part
touches the bearing.
5-74
Replace.
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assembly with the
Crankshaft installer 2 2 2 2 2
90890-01274
Traction spindle 3 3 3 3 3
90890-01275
Adapter 4 4 4 4 4
90890-01383
ENG