Yamaha YZ450FA Automobile User Manual


 
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BALANCER
REMOVING THE BALANCER
1. Straighten the lock washer tab.
2. Loosen:
• Nut (balancer) "1"
• Nut (primary drive gear) "2"
• Nut (balancer shaft driven gear) "3"
Place an aluminum plate "a" between the teeth
of the balancer shaft drive gear "4" and driven
gear "5".
CHECKING THE 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.
CHECKING THE BALANCER
1. Inspect:
• Balancer
Cracks/damage Replace.
INSTALLING THE BALANCER
1. Install:
• Balancer shaft driven gear "1"
Install the balancer shaft driven gear and bal-
ancer shaft with their lower splines "a" aligning
with each other.