NCY 171cc Big Bore Kit – 61mm | No Case-Cut for GY6
Original price was: $140.00.$85.07Current price is: $85.07.
69 in stock
Description
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
IMPORTANT FUELING NOTE: A big-bore kit requires significantly more fuel. You must upjet your carburetor (typically to a 125 or 130 main jet) to prevent a lean condition. To reach the full power potential of 171cc, we highly recommend pairing this with the NCY Big Valve Head (SKU 1100-1254).