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72cc (47mm) kit for all 50cc 4 stroke Chinese...
Bolt and nut set for GY6 50cc 139QMB/QMA...
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72cc (47mm) kit for all 50cc 4 stroke Chinese scooters which use the GY6 139QMA/QMB engines and Kymco 4T. A low cost performance upgrade to stock 50cc engines. Carburettor will need up jetting (approx 10%). Kit is supplied with required top end gaskets, barrel, piston, rings, pin and clips.
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