Boost your bike's performance with this Lifan 140cc 4-Stroke Engine Kit, designed for off-road enthusiasts and DIY builders. This powerful single-cylinder motor features a manual clutch, kick start, and a 4-speed transmission (N1234) with the ability to start in any gear—great for racing, trail riding, or pit bike setups.
Built with an OHC racing head and oil-cooling system, it delivers an impressive 8kW of power at 7500 RPM and 9.5Nm of torque at 5000 RPM, giving you reliable acceleration and speed. The high compression ratio of 9.47:1 ensures efficiency and torque for uphill or rugged terrain.
This complete kit includes all the parts needed for a seamless engine swap—from carburetor and wiring harness to CDI and clutch cable, making it a plug-and-play solution for compatible frames.

Displacement: 140cc
Engine Type: Single Cylinder, Horizontal, 4-Stroke, OHC Racing Head, Oil Cooled
Bore x Stroke: 55mm x 59mm
Max Power: 8kW @ 7500±375 RPM
Max Torque: 9.5N·m @ 5000±250 RPM
Compression Ratio: 9.47:1
Clutch Type: Manual Clutch
Starter: Kick Start
Ignition: CDI
Oil Capacity: 900ml (15W/40-SE Recommended)
Transmission: 4-Speed (N1234), Start in Any Gear, 4 Up
Sprocket: 15T for 428 Chain, 17mm Shaft
Dimensions: 470 x 275 x 280mm
Weight: 23kg
Mounting Bolt Spacing: 154mm / 6 inches
1 × Lifan 140cc Engine
1 × Kick Starter Lever
1 × Gear Shift Lever
1 × Intake Manifold
1 × Manifold Hardware Kit
1 × Carburetor
1 × Air Filter
1 × Wiring loom
1 × CDI Box
1 × Ignition Coil
1 × Clutch Cable