Crankcase assembly: crankcase halves
Place a dial gauge (C) with magnetic base on a support plate fixed to crankcase.
Bring the stylus into contact with the end of the crankshaft and set the dial gauge to zero in this position.
Place a lever (D) between crankcase and crank web of the crankshaft pushing towards dial gauge.
Note on the dial gauge the total clearance and add a preload of (0.30 mm) plus the thickness of the shims used
(1.90x2=3.8 mm).
Divide the resulting value by two to obtain the thickness of the shim packs to be installed at either end of the crankshaft.
Note
After assembling the crankcase halves, the crankshaft should turn with some interference in the new bearings.
Shimming the gearbox shafts
The following thickness spacers are supplied as spare parts.
Position
Gearbox primary shaft
Gearbox secondary shaft
Shimming the gearbox selector drum
The following thickness spacers are supplied as spare parts.
Position
Gear control drum
Reassembly of the crankcase halves
If removed, apply threadlocker on the screw (36), insert it with the washer (37) on the crankcase half and tighten it to
Clutch side (mm) Chain side (mm)
1.2
1.6
3.15
0.8
Clutch side (mm)
Chain side (mm)
1.0
0.9