Yamaha YFM250XL(C) Service Manual page 222

6
FINAL DRIVE GEAR AND DRIVE SHAFT
6 - 36
Thrust washer selection
1.Measure/Select:
Ring gear thrust clearance "C"
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Thrust clearance measurement steps:
Place four pieces of Plastigauge
originally fitted thrust washer and ring
gear.
Install the ring gear assembly and tighten
the bolts to specification.
10 mm Bolts (bearing housing):
40 Nm (4.0 m • kg, 29 ft • lb)
8 mm Bolts (bearing housing):
23 Nm (2.3 m • kg, 17 ft • lb)
NOTE:
Do not turn the shaft drive and ring gear
when measuring clearance with Plasti-
®
gage .
Remove the ring gear assembly.
Measure the thrust clearance. Calculate
width of flattened Plastigauge
Ring gear thrust clearance:
0.1 ~ 0.2 mm (0.004 ~ 0.008 in)
If the out of specification, select the cor-
rect washer.
Thrust washer selection steps:
Select suitable thrust washer by the fol-
lowing chart.
Thrust washer
Thickness (mm)
Repeat measurement steps until the ring
gear thrust clearance is within the speci-
fied limits.
Ring gear thrust clearance:
0.1 ~ 0.2 mm (0.004 ~ 0.008 in)
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DRIV
®
between
®
1.
1.2 1.7 2.0
1.4 1.8 2.1
1.6 1.9