Balancer Shaft Drive Gear And Balancer Shaft Driven Gear Removal Points; Balancer Shaft Removal Points; Primary Drive Gear, Balancer Shaft Drive Gear And Balancer Shaft Driven Gear Inspection; Balancer Shaft Inspection - Yamaha YZ250F(R) Owner's Service Manual

BALANCER
REMOVAL POINTS
Balancer shaft drive gear and balancer
shaft driven gear
1. Straighten the lock washer tab.
2. Loosen:
Nut (primary drive gear) 1
G
Nut (balancer shaft driven gear) 2
G
NOTE:
Place an aluminum plate a between the teeth
of the balancer shaft drive gear 3 and driven
gear 4.
Balancer shaft
1. Remove:
Balancer shaft 1
G
NOTE:
When removing the balancer shaft, align the
center a of the balancer shaft weight along
the line connecting the centers of the crank-
shaft and balancer shaft.
INSPECTION
Primary drive gear, balancer shaft drive
gear and balancer shaft driven gear
1. Inspect:
Primary drive gear 1
G
Balancer shaft drive gear 2
G
Balancer shaft driven gear 3
G
Wear/damage → Replace.
Balancer shaft
1. Inspect:
Balancer shaft
G
Cracks/damage → Replace.
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ENG