Removal of the primary drive gear
Drain the engine oil (Changing engine oil and filter cartridge).
Remove the clutch cover (Removing the clutch cover).
Remove the clutch unit (Removing the clutch).
Remove the oil pump (Removing the oil pump).
Remove clutch housing (1) with needle roller bearing (2) and primary driven gear (3).
Remove inner ring (4) and inner spacer (5).
Straighten lock washer (6) on nut (7) securing primary driving gear (8).
Lock primary drive gear (8) in place with holding tool part no. 88713.0137, and loosen sprocket retaining nut (7).
Remove the nut (7) and the lock washer (6).
Remove the primary driving gear (8) using puller 88713.2092 and interposing a packing piece of aluminium or copper between the crankshaft and the screw of the puller.
Take care not to damage the key (9) located on the crankshaft and the inner spacer (10).