Removing The Balancer Drive Gear And Balancer Driven Gear; Checking The Oil Pump Drive Gear And Oil Pump Driven Gear; Checking The Balancer Drive Gear And Balancer Driven Gear - Yamaha 2004 YXR660 Service Manual

BALANCER GEARS AND OIL PUMP GEARS
REMOVING THE BALANCER DRIVE GEAR
AND BALANCER DRIVEN GEAR
1. Straighten the lock washer tabs.
2. Loosen:
• balancer driven gear nut 1
NOTE:
Place an aluminum plate 2 between the teeth
of the balancer drive gear 3 and balancer
driven gear 4.
3. Remove:
• circlip
• plate 1
• balancer drive gear 2
• springs 3
• pins 4
CHECKING THE OIL PUMP DRIVE GEAR
AND OIL PUMP DRIVEN GEAR
1. Check:
• oil pump drive gear 1
• oil pump driven gear 2
Cracks/wear/damage → Replace.
CHECKING THE BALANCER DRIVE GEAR
AND BALANCER DRIVEN GEAR
1. Check:
• balancer drive gear 1
• balancer driven gear 2
Damage/wear → Replace the balancer drive
gear and balancer driven gear as a set.
Excessive noise
Replace the balancer drive gear and bal-
ancer driven gear as a set.
4 - 50
ENG
→
during operation