Petrol engine kit for small off-road vehicles delivering dependable power and straightforward fitment. Confidence on rides comes from steady idling, rapid starts and robust construction. Is the ACROSSPART 125cc Engine Kit the practical upgrade for a go-kart, quad bike or small motorcycle?
⚡ At a Glance
- • Power Output: Maximum power 5.5 kilowatts at up to 7500±375 rpm, peak torque 8.5 Newton metres
- • Best for: Go-karts, lightweight quad bikes and small motorcycles needing a compact replacement engine
- • Not ideal for: High-performance racing bikes or heavy utility ATVs that require greater displacement or torque
125cc four-stroke single-cylinder unit with electric start, PZ19 carburettor and air cooling. Compact 21kg construction and included mounting accessories enable direct replacement for small off-road machines.
Confident Acceleration - Thanks to 125cc Four-Stroke Single-Cylinder Engine
Parallel four-stroke single-cylinder architecture converts combustion into a steady power curve, achieving up to 5.5 kilowatts and 8.5 Newton metres of torque with a 9:1 compression ratio. Maximum rotational speed is rated at 7500±375 rpm for usable mid-range performance.
Predictable throttle response suits short tracks and trail climbs, delivering usable acceleration without excessive revving.
Quick Starts and Reliable Ignition - With Electric Start, Foot Start and CDI Ignition
Capacitor discharge ignition (CDI) controls spark timing while both electric and foot start options provide redundancy. The PZ19 carburettor supplies a consistent fuel-air mixture to support reliable ignition.
Multiple start methods reduce downtime and simplify cold starts, helping get machines back on the trail quickly.
Low Maintenance and Long Service Life - With Air Cooling and Pressure/Splash Lubrication
Air-cooled design removes the need for a liquid cooling system and pressure/splash lubrication distributes oil to bearings and moving parts without complex plumbing. Precision casting in iron and aluminium improves component durability.
Simpler cooling and lubrication systems keep routine servicing straightforward and help extend usable life for recreational riders.
✨ The 4 Key Reasons for ACROSSPART 125cc Engine Kit
- Electric start and CDI ignition - Faster, more reliable starts in varied conditions and cold weather
- PZ19 carburettor with 35mm air filter - Improved throttle response and cleaner airflow for efficiency
- 3-speed semi-automatic transmission - Simple gear changes for novice riders and easy control
- Compact 21kg weight and included mounts - Easier handling and straightforward direct replacement installation on many small vehicles
📋 Technical Details at a Glance
- Engine type: Four-stroke, single-cylinder, parallel design
- Displacement: 125 cc
- Maximum power: 5.5 kilowatts
- Peak torque: 8.5 Newton metres
- Compression ratio: 9:1
❓ Frequently Asked Questions
Q: Does the engine include mounting accessories for direct replacement?
A: Yes. Supplied as a direct replacement with all necessary mounting accessories, making installation straightforward without specialist tools.
Q: What starting methods and ignition does it use?
A: Electric start and foot start are supported, with CDI ignition for reliable spark timing.
Q: Which vehicles is it compatible with?
A: Designed for go-karts, quad bikes and motorcycles, offering adaptable fitment for small off-road machines.
🏆 Our Verdict
Ideal for owners of go-karts, lightweight quad bikes and small motorcycles seeking a straightforward engine swap. Robust construction, multiple start options and a compact 21kg weight make for a versatile, easy-to-fit replacement. While upfront cost varies, solid build quality and included mounting parts suggest good long-term value for recreational use.
