Removal of the gearbox assembly
Remove the engine from the frame (Removing the engine).
Remove the timing outer covers (Removing the timing outer covers).
Remove the camshafts (Removing the camshafts).
Remove the complete cylinder head unit (Removing the engine heads).
Remove the cylinder/piston assembly (Removing the cylinder/piston assembly).
Remove the generator side cover (Removing the generator cover) and the complete generator (Removing the flywheel/generator unit).
Remove the oil pump (Removing the oil pump).
Remove the starter motor (Removing the starter motor).
Remove the clutch cover (Removing the clutch cover).
Remove the clutch unit (Removing the clutch).
Remove the primary drive gear (Removing the primary drive gear).
Separate the crankcase halves (Separating the crankcase halves).
Withdraw the selector fork shafts (1).
Move the forks (2) and (3) to disengage them from the slots in the gear control drum (4).
Withdraw the gear control drum (4) taking care not to invert shims (5) and (6) mounted on the shaft.
Once removed, it is possible to replace the special rollers (7).
Remove gear selector forks (8) and (9).
Remove the gearbox primary (10) and secondary (11) shafts complete with gears, taking care to recover the spacers on the ends of the shafts.
If the bearing inner rings (A) are left on the shafts, slide them off the ends of the gearbox primary (10) and secondary (11) shafts "Separating the crankcase halves".