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Home > Parts > Kymco Scooter Parts > Kymco Big Bore 47mm AC
Kymco AC 47mm 70cc Big Bore Kit Air Cooled Two Stroke Engines
Affordable big bore for the horizontal Kymco engines used in Super 9 and Super 8 two stroke 50cc Kymco scooters.
Along with a carb upgrade of at the very least an upgrade to stroke carb with main jet and performance air filter the torque and top end speed wakes right up to keep up with traffic.
Do not forget to service your CVT with new kevlar belt and Dr Pulley Sliders at 8gram do not go below 8gram, Kymco scooters do not act right with anything below 8grams on weights.
NOT for Vertcal made engines only horizontal used in these models
Includes cylinder head, cylinder, piston, 12mm pin, rings, circlips, head gasket, base gasket and exhaust gasket.
48 Lower States Only