Yamaha XT250X - Checking the Shift Forks; Checking the Shift Drum Assembly; Checking the Transmission

TRANSMISSION
5-63
EAS26260
CHECKING THE SHIFT FORKS
The following procedure applies to all of the shift
forks.
1. Check:
● Shift fork cam follower “1”
● Shift fork pawl “2”
Bends/damage/scoring/wear → Replace the
shift fork.
2. Check:
● Shift fork guide bar
Roll the shift fork guide bar on a flat surface.
Bends → Replace.
WARNING
EWA12840
Do not attempt to straighten a bent shift fork
guide bar.
3. Check:
● Shift fork movement
(along the shift fork guide bar)
Rough movement → Replace the shift forks
and shift fork guide bar as a set.
EAS26270
CHECKING THE SHIFT DRUM ASSEMBLY
1. Check:
● Shift drum groove
Damage/scratches/wear → Replace the shift
drum assembly.
● Shift drum segment “1”
Damage/wear → Replace the shift drum as-
sembly.
● Shift drum bearing “2”
Damage/pitting → Replace the shift drum as-
sembly.
EAS26290
CHECKING THE TRANSMISSION
1. Measure:
● Main axle runout
(with a centering device and dial gauge “1”)
Out of specification → Replace the main axle.
2. Measure:
●
Drive axle runout
(with a centering device and dial gauge “1”)
Out of specification → Replace the drive axle.
Main axle runout limit
0.08 mm (0.0032 in)
Drive axle runout limit
0.08 mm (0.0032 in)