Shift Drum and Fork Removal
Lower Crankcase Half (see Crankcase Splitting)
External Shift Mechanism (see External Shift Mecha-
Shift Drum Bearing Holder [B]
Pull out the shift rods [C], and take off the shift forks.
Pull out the shift drum [D].
Shift Drum and Fork Installation
Apply engine oil to the shift drum, forks and rods.
Install the shift rods [A], noting the groove position.
Install the forks as shown.
Position the one with shortest ears [B] on the drive shaft
and place the pin in the center groove in the shift drum
The two forks [D] on the output shaft are identical.
Engage the shift drum bearing holder to the groove of the
shift rod, and apply a non-permanent locking agent to the
threads of the holder bolts, and tighten them.
Torque - Shift Drum Bearing Holder Bolts: 12 N·m (1.2
kgf·m, 104 in·lb)
Shift Drum Disassembly
Remove the shift drum (see Shift Drum and Fork Re-
While holding the shift drum with a vise, remove the shift
drum cam holder bolt [A].
Dowel Pin [B]
Shift Drum Assembly
Be sure to install the dowel pin.
Apply a non-permanent locking agent to the threads of
the shift drum cam holder bolts, and tighten them.
Torque - Shift Drum Cam Holder Bolts: 12 N·m (1.2 kgf·m,
Shift Fork Bending
Visually inspect the shift forks, and replace any fork that is
bent. A bent fork could cause difficulty in shifting, or allow
the transmission to jump out of gear when under power.