BALANCER

ENG

REMOVAL POINTS

Balancer shaft drive gear and balancer shaft driven gear

1.Straighten the lock washer tab.

2.Loosen:

Nut (primary drive gear) 1

Nut (balancer shaft driven gear) 2

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

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

Balancer shaft drive gear 2

Balancer shaft driven gear 3 Wear/damage Replace.

Balancer shaft

1.Inspect:

Balancer shaft Cracks/damage Replace.

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Yamaha WR250FM service manual Balancer shaft drive gear and balancer shaft driven gear