1100-1288 171cc Aluminum Big Bore Cylinder Kit for the Genuine 125 and 150 GY6 Scooters

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The NCY 61mm Big Bore Cylinder Kit is a powerful 171.3cc bolt-on kit that boosts the performance of most Genuine and GY6-based 125cc and 150cc engines.Benefits This is the only 61mm cylinder kit available in the U.S. for GY6 engines (as far as we know). The smaller outer cylinder skirt diameter (62.99mm versus the 65mm of other kits) means no cutting or modifications of the engine case are necessary. The lightweight, cut-down piston further enhances performance. Specifications Designed for Geniune and GY6 125/150cc engines Size 62.9mm Outer Cylinder Skirt Diameter Bore 61mm Wrist pin and clips included Piston and Rings included Base gasket and head gasket included Note Does not include head assembly.CompatibilityThis part is compatible with Genuine and GY6-based 125cc and 150cc engines, as well as engines with the following engine codes 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN161QMK-A Other QMJ, QMK, and QMI models Don't see your engine listed? If the engine code includes "QM" or "FM" this part is compatible with your vehicle.Additional Recommendations We recommend jetting this kit significantly richer due to its high-performance capabilities. To optimize both performance and efficiency, consider upgrading to our 61mm big valve head, as some stock heads may not be compatible. Have a look at our Decompression Tube Assembly, which replaces your dipstick and allows excess crank case pressure to be released. It s a good idea to install one of these alongside any cylinder kit upgrade. Visit our NCY Performance Parts page to shop all performance upgrades available for your vehicle.About NCY NCY is the aftermarket performance parts leader for most popular scooter brands including compatible with Honda, compatible with Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan.This product is intended for off-road use only.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 installing.*Performance upgrades are considered racing parts and are not covered by warranty. SPECIFICATIONS Specifications Designed for Geniune and GY6 125/150cc engines Size 62.9mm Outer Cylinder Skirt Diameter Bore 61mm Wrist pin and clips included Piston and Rings included Base gasket and head gasket included 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 NOTE NOTE Does not include head assembly.CompatibilityThis part is compatible with Genuine and GY6-based 125cc and 150cc engines, as well as engines with the following engine codes 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN161QMK-A Other QMJ, QMK, and QMI models Don't see your engine listed? If the engine code includes "QM" or "FM" this part is compatible with your vehicle.Additional Recommendations We recommend jetting this kit significantly richer due to its high-performance capabilities. To optimize both performance and efficiency, consider upgrading to our 61mm big valve head, as some stock heads may not be compatible. Have a look at our Decompression Tube Assembly, which replaces your dipstick and allows excess crank case pressure to be released. It s a good idea to install one of these alongside any cylinder kit upgrade. Visit our NCY Performance Parts page to shop all performance upgrades available for your vehicle.About NCY NCY is the aftermarket performance parts leader for most popular scooter brands including compatible with Honda, compatible with Yamaha, Genuine, Vespa, SYM, Lance, KYMCO, and GY6 / QMB powered scooters. Made in Taiwan with strict quality standards since 1997, NCY is ISO 9001 certified.Made in Taiwan.This product is intended for off-road use only.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 installing.*Performance upgrades are considered racing parts and are not covered by warranty.