Yamaha YXR660FAS Service Manual download pdf (Page 282)

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DRIV

REAR CONSTANT VELOCITY JOINTS, FINAL DRIVE

GEAR AND DRIVE SHAFT

CHECKING THE DRIVE SHAFT

1. Check:

• drive shaft (splines) 1

• coupling gear (splines) 2

Wear/damage → Replace.

1

2

CHECKING THE FINAL GEAR CASE

1. Check:

• final gear case 1

• ring gear bearing housing 2

Cracks/damage → Replace.

NOTE:

When the final gear case and/or the ring gear

bearing housing are replaced, be sure to

adjust the shim of the final drive pinion gear

and/or ring gear.

2. Check:

• gear teeth

Pitting/galling/wear → Replace the drive

pinion gear and ring gear as a set.

• oil seals

• O-rings

Damage → Replace.

3. Check:

• bearings

Damage → Replace.

NOTE:

• Reusing roller bearings is acceptable, but

Yamaha recommends installing new ones.

Do not reuse the oil seal.

• When the final drive pinion gear and/or ring

gear are replaced, be sure to adjust the shim

of the final drive pinion gear and/or ring gear.

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