Installing The Shift Forks And Shift Drum Assembly - Yamaha WR250R Service Manual

2. Measure:
Drive axle runout
G
(with a centering device and dial gauge "1")
Out of specification → Replace the drive axle.
Drive axle runout limit
0.08 mm (0.0032 in)
3. Check:
Transmission gears
G
Blue discoloration/pitting/wear → Replace
the defective gear (s).
Transmission gear dogs
G
Cracks/damage/rounded edges → Replace
the defective gear (s).
4. Check:
Transmission gear engagement
G
(each pinion gear to its respective wheel
gear)
Incorrect → Reassemble the transmission
axle assemblies.
NOTE:
When reassembling the main axle, press the
2nd pinion gear "1" onto it "2" as shown.
a
1
a. 107.4–107.6 mm (4.228–4.236 in)
5. Check:
Transmission gear movement
G
Rough movement → Replace the defective
part (s).
EAS26320
INSTALLING THE SHIFT FORKS AND SHIFT
DRUM ASSEMBLY
1. Install:
NOTE:
The embossed marks on the shift forks should
face towards the clutch side of the engine and
be in the following sequence: "R", "C", "L".
2
5-68
TRANSMISSION
Shift fork guide bar "1"
G
Shift fork-R "2"
G
Shift fork-C "3"
G
Shift fork-L "4"
G
2
1
4
3