Checking The Transmission; Assembling The Main Axle And Drive Axle - Yamaha YZF-R1 2020 Service Manual

• Shift drum segment "1"
Damage/wear → Replace the shift drum as-
sembly.
• Shift drum bearing "2"
Damage/pitting → Replace the shift drum as-
sembly.
G089024
EAS30433

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
0.08 mm (0.0032 in)
2. Measure:
• Drive axle runout
(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)
1
1
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).
G089025
4. Check:
• Transmission gear engagement
(each pinion gear to its respective wheel
gear)
Incorrect → Reassemble the transmission
axle assemblies.
5. Check:
• Transmission gear movement
Rough movement → Replace the defective
part(s).
6. Check:
• Circlips
Bends/damage/looseness → Replace.
EAS30435
ASSEMBLING THE MAIN AXLE AND DRIVE
AXLE
1. Install:
• Toothed washer "1"
• Circlip "2"
New
TIP
• Be sure the circlip sharp-edged corner "a" is
positioned opposite side to the toothed washer
and gear.
• Install the circlip so that a spline "b" is in the
center of the gap between the circlip ends "c"
as shown.
5-102
TRANSMISSION