125cc 4 Stroke Engine Motor, Gas Engine Auto Engine Kit, for Go Kart ATV Dirt Bike Pit Bike, Forward Neutral Reverse, Electric Start CDI Ignition Air Cooled Parallel Single Cylinder

SpecificationsApplicable 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 SizeCondition: NewMaterial: Iron, AluminumProcess: Die Casting, PaintingColor: SilverEngine Type: Parallel 4-Stroke Single-Cylinder EngineTransmission System: Forward-Neutral-ReverseStarting Method: Electric StartIgnition Device: CDICooling Method: Air CoolingStarter Type: Foot StartLubrication Method: Pressure/SplashFuel Type: GasolineCarburetor: PZ19Displacement: 125CCMaximum Power: 5.5KWCompression Ratio: 9:1Max. Speed: 7500±375RPMIdle Speed: 1500±100RPMMax. Torque: 8.5 N.mFront Sprocket: 420-17mm-14TFuel Tank Capacity: 900ml/0.24galAir Filter Diameter: 35mm/1.38inCylinder Diameter*Stroke: 52.4*55.5mm/2.06*2.19inTop Mounting Hole Spacing: 92mm/3.62inBottom Mounting Hole Spacing: 82mm/3.23inBolt Spacing: 152mm/5.98inWay of Use: Direct Replacement Product Size: 48*36*30cm/18.9*14.17*11.81inPackage Size: 50*37.5*32cm/19.69*14.76*12.6inGross Weight: 21.95kg/48.39lbsNet Weight: 21kg/46.3lbsFits (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 SizePackage Included1 * 125CC 4 Stroke Engine MotorAll Accessories for Assembly The Functions Corresponding to Different Colored Cords1. Five Wires (Plug): Gear Indicator2. Yellow Wire: Charging Wire4. Black & Red Wire: Battery Wire5. Green Line: Neutral WireNotes1.We strongly recommend professional installation. 2.Please double-check compatibility before purchasing to ensure proper fit.3.Please allow for slight color differences caused by shooting light and errors caused by manual measurement, and make sure you don't mind before ordering. If you have any questions, please contact us, and we will reply and solve your problem as soon as possible.

• 【Powerful 125cc 4‑Stroke Engine – 5.5kW for Go‑Karts, ATVs & Dirt Bikes】Upgrade your ride with this high‑performance 125cc four‑stroke engine. Delivering 5.5kW of power and 8.5 N.m of torque at speeds up to 7500 RPM, it provides responsive acceleration and reliable power for go‑karts, dirt bikes, ATVs, pit bikes, and buggies – perfect for trail riding, racing, or recreational use.
• 【Electric Start with CDI Ignition – Quick, Effortless Startup】Enjoy convenient, reliable starts every time. The electric start system (foot start compatible) eliminates pull‑cord hassle, while the CDI ignition ensures consistent spark and optimal fuel efficiency. The PZ19 carburetor delivers smooth throttle response across all RPM ranges.
• 【Forward‑Neutral‑Reverse Transmission – Versatile Maneuverability】Navigate tight spaces with ease. The integrated F/N/R gearbox allows precise control – perfect for parking, trailering, or backing out of tricky spots. The 420‑17mm‑14T front sprocket provides compatible drive for most chain‑driven vehicles.
• 【Direct Replacement Design – Fits Multiple 125cc Platforms】Engineered as a direct bolt‑in replacement for popular models including Atomik, Pitpro, TDR, Hummer, Orion, Xmoto, Lei, Dmx, Swd, Tomahawk, and many 125cc go‑karts, quads, and dirt bikes. The die‑cast aluminum and iron construction with painted finish resists rust and impact.
• 【Complete Drop‑In Kit – All Mounting Hardware Included】Everything you need in one box: 125cc powerhead, CDI, carburetor, and all necessary components. The air‑cooled design with pressure/splash lubrication ensures long‑lasting performance. Professional installation recommended. Ideal for mechanics, hobbyists, and racers seeking reliable replacement power.