Checking The Shift Forks; Checking The Shift Drum; Checking The Transmission - Yamaha YBR125ED 2005 Service Manual

TRANSMISSION
EAS00421

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
_
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.
EAS00422

CHECKING THE SHIFT DRUM

1. Check:
• shift drum grooves
Damage/scratches/wear → Replace the
shift drum assembly.
• shift drum segment
Damage/wear → Replace the shift drum
assembly.
EAS00425

CHECKING THE TRANSMISSION

1. Measure:
• main axle runout
(with a centering device and dial gauge 1)
Out of specification → Replace the main
axle.
Main axle runout limit
0.03 mm (0.0012 in)
5 - 80
ENG