Inspection - Yamaha YFM250XL(C) Service Manual

FINAL DRIVE GEAR AND DRIVE SHAFT
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6.Remove:
Roller bearing 1 (drive pinion gear)
*********************************
Removal steps:
Heat the main housing only to 150˚C
(302˚F).
Remove the roller bearing outer race with
an appropriately shaped punch 2.
Remove the inner race from the final drive
shaft.
NOTE:
The removal of the final drive shaft roller
bearing is difficult and seldom necessary.

INSPECTION

1.Inspect:
Gear teeth 1
Pitting/Galling/Wear → Replace drive pin-
ion gear and ring gear as a set.
Oil seal 2
O-ring 3
Damage → Replace.
2.Inspect:
Bearings 4
Damage → Replace.
NOTE:
Reuse of roller bearing OK, but Yamaha
recommends installation of new bearing.
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, refer to the "FINAL DRIVE
GEAR AND RING GEAR SHIM SELEC-
TION" section.
3.Inspect:
Drive shaft 1 (splines)
Wear/Damage → Replace.
DRIV
6