NCY 72cc Big Bore Piston & Cylinder Kit - Yamaha, Genuine 2T

Unlock more power from your 50cc 2-stroke scooter with the NCY 72cc Big Bore Kit . Designed as a direct bolt-on upgrade for Minarelli horizontal engines, this kit delivers a noticeable bump in displacement, throttle response, and top-end pull — all without major engine modifications. Ideal for riders looking to breathe new life into a Genuine Buddy 50, Yamaha Zuma, or any compatible Chinese 2T platform. Key Features 72cc displacement upgrade from stock 50cc 47mm forged aluminum piston with 2 piston rings 10mm wrist pin with G-clips included Full top-end overhaul kit — everything needed for installation Direct bolt-on for Minarelli 50cc horizontal 2-stroke engines Requires carburetor re-jetting after installation (larger main jet recommended) Technical Specifications Displacement: 72cc Bore: 47mm Wrist Pin: 10mm Piston Rings: 2 included Engine Type: 2-stroke Minarelli horizontal Weight: 8.0 lbs Model Compatibility Brand Model Genuine Scooter Co. Buddy 50, RoughHouse 50, Rattler 50, Black Cat 50 Yamaha Jog 50, Zuma 50 (2T), Vino 50 (2T) Adly & Chinese 2T Minarelli 50cc horizontal 2-stroke platforms (see full list below) About NCY NCY is a respected Taiwanese manufacturer of performance scooter parts, known for precision engineering and broad fitment across popular 50cc platforms. Their big bore kits are a go-to upgrade for riders and shops looking for reliable, bolt-on performance gains. California Prop 65 Warning: www.p65warnings.ca.gov *Performance upgrades are considered racing parts and are not covered by warranty. Intended for off-road use only. Check local laws regarding pollution-controlled vehicles.