NCY Cylinder Kit (Aluminum, 61mm, 171cc); Genuine/GY6

DESCRIPTION: 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.Compatibility:This 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 Honda, 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.Compatibility:This 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 Honda, 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.