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Polini Motori has created this engine crankcase to increase the power of your moped. This crankcase can be used both to mount original cylinders or oversized cylinders: piston Ø 41-43-46.

With the new crankcase it is not essential to modify the crankshaft because the intake valve is further advanced than the original; however, if you have an already advanced crankshaft, you can still fit it because it will not compromise the maximum power of the engine, but will improve power at low speeds. To fit the new crankcases it is necessary to remove the engine block from the frame, dismantle the entire engine and carefully wash all the parts to be reused including the new crankcases

For the version with electronic ignition, the phase does not require any adjustment. Complete the assembly operation of the various parts and position the engine on the frame.

CARBURETORPISTON Ø 38.4-41PISTON Ø 43PISTON Ø 46
SHA 13 - 13
Max. jet
Max. jet
Max. jet
64
66
66-68

ENGINE CARTER.CIAO-BRAVO-BOXER-SI-CBA-CONTACTS
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PIAGGIO: BOXER - BRAVO - CBA - CIAO - ECO - GRILLO - SI - TREND
GILERA: CBA
CYLINDER PORT DIAMETER 50 mm.





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Polini Motori has created this engine crankcase to increase the power of your moped. This crankcase can be used both to mount original cylinders or oversized cylinders: piston Ø 41-43-46. With the new crankcase it is not essential to modify the crankshaft because the intake valve is further advanced than the original; however, if you have an already advanced crankshaft, you can still fit it because it will not compromise the maximum power of the engine, but will improve power at low speeds. To fit the new crankcases it is necessary to remove the engine block from the frame, dismantle the entire engine and carefully wash all the parts to be reused including the new crankcases For the version with electronic ignition, the phase does not require any adjustment. Complete the assembly operation