Engine Cases (Pair, Long, Big Bore, Custom); GY6

DESCRIPTION: Scooterworks offers our exclusive pair of Custom Big Bore Engine Cases for GY6 long engines. We machine these in matched pairs ourselves, and we bore them up to 63mm, big enough to fit a 63mm performance cylinder kit. Go big! Pick up a new crankcase gasket while you’re at it. Specifications:
Matched right and left sides
Stamped serial numbers ensure you have a matched set
Dimensions: 10″L x 10″W x 4″H
Compatibility:157QMJ-based 125cc / 150cc / 169cc 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 product is compatible with your vehicle.About Scooterworks: Since our beginning in 1989, Scooterworks has become a major supplier of parts and accessories for vintage and modern scooters. We have everything you need, from wear-and-tear items like tires and oil filters to aftermarket parts from brands like Malossi, NCY, Prima, YSS, Dr. Pulley, and more.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:
Matched right and left sides
Stamped serial numbers ensure you have a matched set
Dimensions: 10″L x 10″W x 4″H

COMPATIBILITY: Compatibility:157QMJ-based 125cc / 150cc / 169cc 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 product is compatible with your vehicle.About Scooterworks: Since our beginning in 1989, Scooterworks has become a major supplier of parts and accessories for vintage and modern scooters. We have everything you need, from wear-and-tear items like tires and oil filters to aftermarket parts from brands like Malossi, NCY, Prima, YSS, Dr. Pulley, and more.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.

157QMJ ENGINES: 157QMJ-based 125cc / 150cc / 169cc 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 product is compatible with your vehicle.About Scooterworks: Since our beginning in 1989, Scooterworks has become a major supplier of parts and accessories for vintage and modern scooters. We have everything you need, from wear-and-tear items like tires and oil filters to aftermarket parts from brands like Malossi, NCY, Prima, YSS, Dr. Pulley, and more.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.

MODEL FITMENTS: Brands: 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