Replacement motorcycle engine designed to deliver dependable power and efficient fuel use for off-road machines, ACROSSPART 125cc Engine. Riders and tinkerers gain confidence from steady starts and robust construction during weekend track sessions. Is it worth fitting in a DIY swap or performance upgrade?
⚡ At a Glance
- • Power Output: Maximum power 6.5 kilowatts at around 7,500 rpm, with measured efficiency for small-displacement engines
- • Best for: Pit bikes, go-karts and DIY replacement swaps where compact, reliable power is required
- • Not ideal for: Applications demanding higher displacement or liquid cooling for prolonged high-speed running
Four-stroke, single-cylinder design balances performance with fuel economy. Air cooling and a 4-speed manual clutch make the unit suitable for off-road and recreational use.
Consistent torque and efficiency, thanks to the four-stroke design
Four-stroke cycle optimises intake, compression, combustion and exhaust phases to reduce wasted fuel. Rated maximum power is 6.5 kilowatts at about 7,500 rpm, and fuel consumption is specified at no more than 367 grams per kilowatt-hour.
Predictable throttle response and lower fuel use help extend range during track sessions and leisure rides. Power delivery suits riders seeking steady acceleration rather than peaky behaviour.
Durable build quality, with aluminium alloy and cast steel construction
Primary components use premium aluminium alloy for rigidity and heat dissipation, while cast steel sections increase wear resistance. Corrosion protection is included to withstand harsh operating conditions.
Longer service life and reduced maintenance demands compared with lower-grade replacements. Confidence in the mechanical integrity makes the unit attractive for regular off-road use.
Reliable starts and precise control, with CDI ignition and 4-speed manual clutch
CDI ignition improves energy conversion and ensures rapid spark delivery for dependable starting. The manual four-speed transmission provides straightforward gear engagement for varied terrain.
Fast, secure starts cut time spent troubleshooting, and the gearbox gives usable ratios for tight tracks and slow-speed manoeuvres. Suitable for riders who value predictable control.
✨ The 4 Key Reasons for ACROSSPART 125cc Engine
- Maximum power 6.5 kW - Delivers usable acceleration for pit bikes and small go-karts
- Low fuel consumption spec - Up to 367 g/kWh, helping reduce running costs over time
- Aluminium alloy and cast steel - Improves durability and resists wear under heavy use
- CDI ignition and 4-speed clutch - Ensures dependable starting and straightforward gear control
📋 Technical Details at a Glance
- Displacement: 125cc
- Engine type: Four-stroke
- Cylinder count: Single cylinder
- Max power: 6.5 kilowatts
- Power rpm: 7,500 rpm ±375 rpm
❓ Frequently Asked Questions
Q: Is this engine suitable for pit bikes and go-karts?
A: Yes. Product descriptions explicitly reference go-kart and pit bike replacement applications, making it suitable for those platforms.
Q: Does the engine include an ignition system?
A: Yes. A CDI ignition system is specified, which improves ignition efficiency and helps secure rapid starts.
Q: How easy is installation and starting in real use?
A: User feedback notes easy and quick installation, along with smooth, steady performance and reliable starts, indicating a straightforward fit for compatible frames and mounts.
🏆 Our Verdict
Ideal for riders and DIY mechanics who need a compact, dependable 125cc replacement for off-road bikes and go-karts. Robust aluminium and cast steel construction combined with a four-stroke layout and CDI ignition set the unit apart for durability and reliable starting. While initial purchase decisions depend on supplier options, long-term value is supported by fuel efficiency and solid build quality.
