Ducati MONSTER 821 Workshop Manual page 1070

Remove gear selector forks (2), (3) and (4).
Remove the gearbox primary (9) and secondary (10) shafts complete with gears, taking care to recover the
shim washers 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 (9) and
secondary (10) shafts (Separating the crankcase
halves).
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