Vittorazi Motors COSMOS 300 Maintenance Manual page 35

Remove the 4 Allen screws M6x30 (1) from the carburettor flange (2).
Remove the following components from the engine casing (8): carburettor flange (2), flange
gasket (3), O-ring (4), flow guide (5), reed valve (6), reed valve gasket (7).
Remove the 3 Phillips screws M3x6 (9) from one side of the reed valve.
Remove the stoppers (10) and petals (11).
Carry out the same operations on the other side of the reed valve.
Cosmos 300 – Maintenance manual – V2 35