Checking The Shift Forks; Checking The Shift Drum Assembly; Checking The Transmission - Yamaha YZF-R15 Service Manual

CHECKING THE SHIFT FORKS

The following procedure applies to all of the shift
forks.
1. Check:
Shift fork cam follower "1"
l
Shift fork pawl "2"
l
Bends/damage/scoring/wear → Replace the
shift fork.
2. Check:
Shift fork guide bar
l
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
l
(along the shift fork guide bar)
Rough movement → Replace the shift forks
and shift fork guide bar as a set.

CHECKING THE SHIFT DRUM ASSEMBLY

1. Check:
Shift drum groove
l
Damage/scratches/wear → Replace the shift
drum assembly.
Shift drum segment "1"
l
Damage/wear → Replace the shift drum as-
sembly.
Shift drum bearing "2"
l
Damage/pitting → Replace the shift drum as-
sembly.

CHECKING THE TRANSMISSION

1. Measure:
Main axle runout
l
(with a centering device and dial gauge "1")
Out of specification → Replace the main axle.
Main axle runout limit
0.08 mm
2. Measure:
Drive axle runout
l
(with a centering device and dial gauge "1")
Out of specification → Replace the drive axle.
Drive axle runout limit
0.08 mm
5-66
TRANSMISSION