Yamaha BEARTRACKER YFM250XC, Service Manual

Page: 217 / 398

6 - 31
DRIV
FINAL DRIVE GEAR AND DRIVE SHAFT
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.
6