DESCRIPTION: Complete 4-stroke 50cc engine for CSC go, go MAX, Bella Classic, Nitro Sport, Pug 50, and other 50cc 139QMB gas scooter engines with automatic CVT transmission and rear drum brakes. Includes electric starter, kick start, and CVT. Brake shoes not included.This scooter engine is designed specifically for use with 10 diameter rear rims. This corresponds to a tire size of 2.75-10 through 3.50-10. Please be sure your rear tire diameter falls within the range of these sizes.This engine is shipped dry and includes 1 Liter of Bel-Ray Gear Saver Hypoid Oil and 1 Liter of Bel-Ray Engine Oil. DO NOT RUN ENGINE WITHOUT ADDING SPECIFIED AMOUNTS OF OIL.Original Parts For Scooters SKU 220-40Specifications: Output Shaft Length: 54mm CVT Cover (short case): 16 inches Set up for drum brake Set Up for PAIR Emissions System 69mm Valves 8 Pole A/C Stator Includes Premium Bando Drive Belt and NGK Spark Plug Engine Oil: 0.8 Liters Gear Oil: 0.12 Liters (filling) and 0.10 Liters (changing) Engine type: Single Cylinder 4-Stroke Cooling: Air Cooled Displacement: 49cc Bore Stroke(mm): 39 X 41.5 Max Power (kw/rpm): 2.3/7500 Max Torque (N-m/rpm): 3.2/6500 Min Unload Stable Rotation (rpm): 1600 +/- 100 Starting: Electric/kick Compatibility: CSC Bella Classic 50 CSC Nitro Sport 50 CSC Pug 50 CSC go CSC go MAX 139QMB-based 50cc / 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA-2 YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models Don’t see your engine listed? If the engine code includes QM or FM, this product is compatible with your vehicle.Please choose carefully! Scooterworks now has a firm no return policy on engines, barring manufacture defects or shipping damage.Product is intended as OEM equivalent for listed models. Any misuse, alteration or alternative application is prohibited by law.This product is not available for international or expedited shipping and will ship only via U.S. domestic ground. This product can only be shipped to the contiguous United States (lower 48 states and D.C.). International orders and orders bound for Alaska, Hawaii, or Puerto Rico for this item will be canceled.nnSPECIFICATIONS: Output Shaft Length: 54mm CVT Cover (short case): 16 inches Set up for drum brake Set Up for PAIR Emissions System 69mm Valves 8 Pole A/C Stator Includes Premium Bando Drive Belt and NGK Spark Plug Engine Oil: 0.8 Liters Gear Oil: 0.12 Liters (filling) and 0.10 Liters (changing) Engine type: Single Cylinder 4-Stroke Cooling: Air Cooled Displacement: 49cc Bore Stroke(mm): 39 X 41.5 Max Power (kw/rpm): 2.3/7500 Max Torque (N-m/rpm): 3.2/6500 Min Unload Stable Rotation (rpm): 1600 +/- 100 Starting: Electric/kicknnCOMPATIBILITY: CSC Bella Classic 50 CSC Nitro Sport 50 CSC Pug 50 CSC go CSC go MAX 139QMB-based 50cc / 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA-2 YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models Don’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.Please choose carefully! Scooterworks now has a firm no return policy on engines, barring manufacture defects or shipping damage.Product is intended as OEM equivalent for listed models. Any misuse, alteration or alternative application is prohibited by law.This product is not available for international or expedited shipping and will ship only via U.S. domestic ground. This product can only be shipped to the contiguous United States (lower 48 states and D.C.). International orders and orders bound for Alaska, Hawaii, or Puerto Rico for this item will be canceled.nn139QMB ENGINES: 139QMB-based 50cc / 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA-2 YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB BN139QMB 147QMD Other QMA models Other QMB models Don’t see your engine listed? If the engine code includes “QM” or “FM”, this product is compatible with your vehicle.Please choose carefully! Scooterworks now has a firm no return policy on engines, barring manufacture defects or shipping damage.Product is intended as OEM equivalent for listed models. Any misuse, alteration or alternative application is prohibited by law.This product is not available for international or expedited shipping and will ship only via U.S. domestic ground. This product can only be shipped to the contiguous United States (lower 48 states and D.C.). International orders and orders bound for Alaska, Hawaii, or Puerto Rico for this item will be canceled.nnMODEL 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