Specifications Applicable Models: For Atomik, Pitpro, TDR, Hummer, Orion, Xmoto, Lei, Dmx, Swd, Tomahawk, Go Kart, Quad, Dirt Bike, ATV, Pit Bike, Buggy, Rocket Car For 125cc Engine Size Condition: New Material: Iron, Aluminum Process: Die Casting, Painting Color: Silver Engine Type: Parallel 4-Stroke Single-Cylinder Engine Transmission System: Forward-Neutral-Reverse Starting Method: Electric Start Ignition Device: CDI Cooling Method: Air Cooling Starter Type: Foot Start Lubrication Method: Pressure/Splash Fuel Type: Gasoline Carburetor: PZ19 Displacement: 125CC Maximum Power: 5.5KW Compression Ratio: 9:1 Max. Speed: 7500±375RPM Idle Speed: 1500±100RPM Max. Torque: 8.5 N.m Front Sprocket: 420-17mm-14T Fuel Tank Capacity: 900ml/0.24gal Air Filter Diameter: 35mm/1.38in Cylinder Diameter*Stroke: 52.4*55.5mm/2.06*2.19in Top Mounting Hole Spacing: 92mm/3.62in Bottom Mounting Hole Spacing: 82mm/3.23in Bolt Spacing: 152mm/5.98in Way of Use: Direct Replacement Product Size: 48*36*30cm/18.9*14.17*11.81in Package Size: 50*37.5*32cm/19.69*14.76*12.6in Gross Weight: 21.95kg/48.39lbs Net Weight: 21kg/46.3lbs Key Features Build to Last: It is made of high-quality iron and aluminum with die casting and paint spraying processes, which is rustproof, impact-resistant, not easy to crack, and can ensure a long service life. Robust Power: The 5.5KW high-power parallel 4-stroke single-cylinder engine has a maximum speed of 7500 ± 375RPM, coupled with a torque of 8.5N. m, allowing you to easily shuttle through various terrains. Highlights Brand New, With High Quality Strong Power Trouble-free Installation Exquisite Craftsmanship Direct Replacement  Long Service Life Improving Vehicle Safety Comfortable Driving The Functions Corresponding to Different Colored Cords 1. Five Wires (Plug): Gear Indicator 2. Yellow Wire: Charging Wire 4. Black & Red Wire: Battery Wire 5. Green Line: Neutral Wire Fits (As a Reference) For Atomik, Pitpro, TDR, Hummer, Orion, Xmoto, Lei, Dmx, Swd, Tomahawk, Go Kart, Quad, Dirt Bike, ATV, Pit Bike, Buggy, Rocket Car For 125cc Engine Size Package Included 1 * 125CC 4 Stroke Engine Motor All Accessories for Assembly