Checking The Shift Drum Assembly; Checking The Transmission - Yamaha YZF-R1 1998 Service Manual

TRANSMISSION
3. Check:
• shift fork movement
(along the shift fork guide bar)
Rough movement → Replace the shift
fork(-s) and shift fork guide bar as a
set.
EB413410

CHECKING THE SHIFT DRUM ASSEMBLY

1. Check:
• shift drum grooves
Damage/scratches/wear → Replace the
shift drum assembly.
• shift drum segment 1
Damage/wear → Replace the shift
drum assembly.
• shift drum bearing 2
Damage/pitting → Replace the shift
drum assembly.
EB413422

CHECKING THE TRANSMISSION

1. Measure:
• main axle runout
(with a centering device and dial
gauge 1)
Out of specification → Replace the
main axle.
Max. main axle runout
0.08 mm
2. Measure:
• drive axle runout
(with a centering device and dial
gauge 1)
Out of specification → Replace the
drive axle.
Max. drive axle runout
0.08 mm
3. Check:
• transmission gears
Blue discoloration/pitting/wear →
Replace the defective gear(-s).
• transmission gear dogs
Cracks/damage/rounded edges →
Replace the defective gear(-s).
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