NCY 171cc Big Bore Kit (61mm) - No Case-Cut for GY6
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NCY 171cc Big Bore Kit (61mm) – No Case-Cut for GY6 150
The NCY 61mm Cylinder Kit is the only 171cc upgrade available in the U.S., designed to fit without machining your engine cases. Featuring a specialized 62.9mm outer skirt, this aluminum cylinder drops directly into standard GY6 150cc blocks. It is the ultimate "weekend project" for riders demanding a massive jump in torque and acceleration without the need for professional machine shop services.
The NCY Performance Advantage
- True Bolt-On Engineering: Slim-skirt design eliminates the need to "split the cases" or grind the engine block for clearance.
- Advanced Thermal Cooling: All-aluminum construction dissipates heat significantly faster than stock cast-iron cylinders, preventing power fade during long-distance riding.
- High-RPM Piston: Includes a specialized "short-skirt" racing piston to reduce reciprocating mass, allowing for faster revving and higher top-end potential.
- Comprehensive Kit: Includes cylinder, piston, rings, wrist pin, clips, and performance gaskets.
Detailed Model Fitment
| Category | Compatible Models / Codes |
|---|---|
| Genuine Scooter Co. | Buddy 125, Buddy 150, Buddy 170i, Hooligan 170i, Blur 150 |
| Go-Karts / Buggies | Hammerhead 150, Trailmaster 150 (all variants), Yerf-Dog, Carter Talon |
| Chinese GY6 Brands | TaoTao, Wolf, Ice Bear, Bintelli, Peace Sports, ZNEN, SSR, Kymco |
| Engine Codes | 157QMJ, 1P57QMJ, 152QMI, 161QMK, BN157QMJ, BN161QMK-A |
Technical Specifications
- Displacement: 171.3cc (61mm Bore)
- Outer Skirt Diameter: 62.99mm (Direct Fit)
- Material: High-Grade Aluminum
- SKU: 1100-1288
This product is not intended for use on public roads or land.
This product is not legal for use in California on pollution-controlled vehicles. Check local laws before installation.
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.