140CC Engine 4 Stroke Racing Engine, 4 Speed Horizontal Single Cylinder Motor Engine CDI Electric Start Manual Clutch Fit for Pit Dirt Bike CRF50 CRF70 XR50 XR70 Z50 Z50R CT70 CT90

Unleash more power on your ride with this 156FMJ 140cc 4-Stroke Racing Engine Kit. Designed for dirt bikes and pit bikes, this engine features a single-cylinder, horizontal layout, with oil cooling and an overhead cam (OHC) racing head to keep performance high and temperature under control.Whether you're upgrading or replacing, this engine delivers up to 8kW of power at 7500 RPM and 9.5N·m torque at 5000 RPM, making it perfect for serious off-road riding. The engine supports kick and electric starting and allows for starting in any gear with its 4-up gear configuration (0-1-2-3-4).Compatible with a wide range of bikes including CRF50/70, XR50, CT70, Z50, Apollo, SSR, Coolster, Taotao, and more (bolt spacing 154mm / 6 inch).【Specifications】Type: Single-cylinder, Horizontal, 4-Stroke, 2-Valve, OHC Racing Head, Oil-CooledDisplacement: 140ccStarter: Kick/ElectricClutch: Manual ClutchIgnition: CDIGear Pattern: 0-1-2-3-4 (Start in Any Gear)Sprocket: 428-15T, 17mmFuel Type: GasolineEngine Oil Capacity: 900ml (15W/40-SE)Max Power: 8kW @ 7500 ±375 RPMMax Torque: 9.5N·m @ 5000 ±250 RPMCompression Ratio: 8.8:1Dimensions: 470 x 275 x 280mmWeight: 23kgMounting Bolt Spacing: 154mm / 6 inches【Package Includes】1 x 156FMJ 140cc Engine1 x Kick Starter Lever1 x Gear Shift Lever1 x Intake Manifold1 x Manifold Hardware Kit

High-Performance 140cc Engine: Single-cylinder, horizontal 4-stroke engine with OHC racing head and oil cooling—delivers 8kW at 7500 RPM and 9.5N.m torque at 5000 RPM.

Manual Clutch & Dual Start Modes: Equipped with a manual clutch and both kick and electric start options; supports “Start in Any Gear” 4-up shifting (0-1-2-3-4).

Durable & Efficient Build: Compression ratio 8.8:1; fuel type: gasoline; oil capacity: 900ml (recommended 15W/40-SE). Compact dimensions: 470 x 275 x 280mm, weight: 23kg.

Universal Compatibility: Fits popular models such as Apollo RFZ125, SSR110, Taotao DB14/DB17, CRF50, XR50, CT70, Z50, Monkey, and more with 154mm (6 inch) mounting bolt spacing.

Complete Engine Kit Included: Package comes with 140cc engine, kick starter lever, gear shift lever, intake manifold, and manifold hardware kit—everything you need for installation.