Gearbox assembly: gearbox shafts
Inspection of the gear selector drum
Use a gauge to measure the clearance between fork pin and the slot on the selector drum.
If the service limit is exceeded, determine which part must be replaced by comparing these dimensions with those of new
components (Sect. 3 - 1.1, Gearbox).
Also check the wear on the drum support pins; these must not show any signs of scoring, burrs, or deformation.
Turn the drum in the crankcase to establish the extent of radial play. If play is excessive, change whichever part is most
worn.
Reassembly of the gearbox shafts
Figure 1 shows all the parts to be reassembled on the gearbox primary shaft (2), with the calculated end shims (1) and
(11) (Sect. 9 - 9.2,
Shimming the
shafts).