Crankcase; Crankcase Disassembly - Vittorazi Motors COSMOS 300 Maintenance Manual

3.15 Crankcase

Bearings (C005)
Crankshaft (C001) includes: nut M12x1,25 (C037),
Seeger ring (C005c)
Oil seals* (C006, C001e)
Gasket* (C412)
Screws M5x12* (C005b)
Bearing retainer* (C005a)
Components
Countershaft (C001b)
to replace
Crankcase (C002) includes: bearing retainer
(C005a), screws M6x50 (M119), brass junction
(M024)
Three Bond 1215 silicone paste* (ACC131)
FP Silicompound 225*
Countershaft locking tool (ACC117).
Extractor (ACC113).
Specific tool (ACC118).
Specific tool (ACC119).
Special tools
Specific tool (ACC120).
Specific tool (ACC121).
Screws M6x50: 10 Nm.
Screws M5x12: 8 Nm.
Screws M6x25: 10 Nm.
Values
Impeller nut M5: 8 Nm
*Always replace it when disassembled.

3.15.1 Crankcase disassembly

Before disassembling the engine crankcase, remove the airbox (3.3 Airbox), the carburettor
(3.4 Carburettor), the reed valve (3.5 Reed valve), the exhaust system (3.7 Exhaust system),
the coolant (3.8 Cooling system), the rubber mountings (3.9 Rubber mountings), the pull
starter system (3.10 Pull starter system), the electric starter (3.11 Electric starter), the flywheel
(3.12 Flywheel), the transmission (3.13 Transmission) and the cylinder unit (3.14 Piston,
cylinder, head).
Cosmos 300 – Maintenance manual – V2
Time limit
200 h
on condition
200 h
200 h
200 h
200 h
on condition
on condition
200 h
200 h
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