Refitting The Primary Drive Gears And Checking Backlash - Ducati SCRAMBLER 800 Workshop Manual

Refitting the primary drive gears and checking backlash

Fully degrease the crankshaft splined end and the corresponding spline on the primary drive gear.
Check that tab and inner spacer are positioned on the crankshaft.
Fit the driving gear onto the crankshaft with the oil pump drive sprocket facing the crankcase.
Temporarily secure the gear with the washer (6) and ring nut (7).
To check the backlash, temporarily fit the clutch housing (1) complete with inner spacer (4), the driven gear
(2), the roller bearing (3) and the inner race on the gearbox primary shaft.
Warning
If fitting a new primary driving gear, check the backlash.
Fix a dial gauge to the crankcase, positioning the stylus against a gear tooth.
Turn the driven gear (2) to mesh the teeth and check that backlash ranges between 0.05 and 0.07 mm.
Repeat the check at 16 different points of the driven gear.
If the measured values are outside the tolerance limits, try changing the position of driven gear (2) on the
primary shaft, leaving the driving gear (8) on the crankshaft in the same position.