Disassembly Of The Gearbox Shafts - Ducati Monster 796 Workshop Manual

Gearbox assembly: gearbox shafts
Remove the gearbox primary (2) and secondary (25) 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 (2) and secondary (25)
shafts (Sect. 9 - 9.2, Overhauling the main bearings).
After removing them from the shafts, install them in the respective outer bearings in the engine crankcase half.

Disassembly of the gearbox shafts

Place the shaft in a vice in such a way as to facilitate the disassembly operations.
Important
Take care not to invert the positions of the shims on reassembly:
this would potentially lead to jamming when using the gear selector control, making it necessary to reopen the engine
crankcase.
Disassembly of the gearbox secondary shaft
Remove the chain-side shim (15) and clutch-side shim (26) from the secondary shaft.
Withdraw the first speed driven gear (18) with the roller cage (17) and the shim (19).