NCY 72cc Big Bore Piston & Cylinder Kit - Yamaha, Genuine 2T
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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.
Shipping information
Orders are prepared as quickly as possible. Delivery times and shipping costs are calculated at checkout based on the destination and items ordered.
Returns & warranty
Please verify fitment and part number before ordering. Contact Thrifty Scooters promptly if an item arrives damaged or incorrect.