NCY 171cc Aluminum Big Bore Kit (61mm) — No Case-Cut for GY6

Name: NCY 171cc Aluminum Big Bore Kit (61mm) — No Case-Cut for GY6
Brand: NCY
SKU: 1100-1288
Price: 171.0 USD
Availability: InStock

SKU 1100-1288

$171.00

Shipping calculated at checkout.

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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

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).

Product Diagrams

Model Fitments

Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more