Removing The Balancer Drive Gear And Balancer Driven Gear; Checking The Oil Pump Driven Gear; Checking The Balancer Drive Gear And Balancer Driven Gear - Yamaha YFM400FAR Service Manual

BALANCER GEARS AND OIL PUMP
– 50 –
REMOVING THE BALANCER DRIVE GEAR
AND BALANCER DRIVEN GEAR
1.Straighten the lock washer tabs.
2.Loosen:
Balancer driven gear nut 1
G
NOTE:
Place an aluminum plate 2 between the teeth
of the balancer drive gear 3 and balancer
driven gear 4.
REMOVING THE BALANCER DRIVE GEAR
AND BUFFER BOSS
1.Remove:
Plate 1
G
Balancer drive gear 2
G
Springs 3
G
Pins 4
G

CHECKING THE OIL PUMP DRIVEN GEAR

1.Check:
Oil pump driven gear 1
G
Cracks/wear/damage → Replace.
CHECKING THE BALANCER DRIVE GEAR
AND BALANCER DRIVEN GEAR
1.Check:
Balancer drive gear 1
G
Balancer driven gear 2
G
Damage/wear → Replace the balancer drive
gear and balancer driven gear as a set.
Excessive noise during operation → Replace
the balancer drive gear and balancer driven
gear as a set.
ENG