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".