8 Best Pit Bike Engines 2025 in the United States

The Bikerid 125CC 4 Stroke Engine Motor Kit is designed for a variety of Honda pit bikes and similar models, making it versatile and widely compatible. It features a 125cc, single-cylinder, air-cooled engine, which is a solid choice for pit bikes, providing a good balance of power and simplicity.

With a maximum power output of 6.5 kW at 7500 rpm and a manual 4-speed transmission (1 down, 3 up), riders can expect decent performance and control. The inclusion of necessary accessories like the carburetor, kick starter lever, and gear shift lever adds value, making it a comprehensive kit for installation.

The engine also features a wet multi-plate clutch and CDI ignition system which are reliable for consistent performance. However, the cooling system is air-cooled, which might not be as efficient as liquid-cooled systems in preventing overheating during extended use. Fuel consumption is moderately efficient, while the lubricant capacity is 900ml, suitable for this engine size. This kit is best suited for DIY enthusiasts and those looking to replace or upgrade engines in compatible Honda pit bikes.

The LIYUANJUN 125CC 4-Stroke Engine Motor Kit is a robust option for pit bike enthusiasts, specifically tailored for Honda models like the CRF50, XR50, and others. With a 125cc engine displacement, it offers a substantial power boost for your dirt bike. The engine type is a single-cylinder, 4-stroke, which is known for its durability and efficiency. The air-cooled system is effective in preventing overheating during long rides, ensuring a smooth performance even under strenuous conditions.

The manual clutch with a 4-speed transmission allows for precise control and a more engaging riding experience, which can be particularly appealing to those who enjoy a hands-on approach to riding and maintenance. This setup also tends to be more cost-effective compared to automatic transmissions. The included PZ22 carburetor enhances fuel efficiency and provides a consistent throttle response, contributing to an enjoyable ride. However, the kick starter might be inconvenient for some users who prefer an electric start. Additionally, while the manual clutch offers greater control, it may present a learning curve for beginners.

The CDI ignition system optimizes spark timing and intensity, further enhancing fuel efficiency and engine performance. Given its compatibility with various Honda pit bike models, this engine kit is a versatile option for those looking to upgrade their bike's performance. It's advisable to confirm compatibility with your specific model before purchasing. This engine kit could be an excellent choice for intermediate to advanced users who appreciate hands-on control and maintenance.

The TDPRO Full Set of Lifan 125cc Engine is a semi-automatic 4-stroke motor designed for trail bikes, including models like CT70, 90, 110, and 125. This engine features a 125cc displacement, which offers a decent balance of power and efficiency for recreational and light off-road use. It comes with an automatic clutch system and a 4-speed transmission (N-1-2-3-4), allowing for smooth gear transitions and ease of use, especially for inexperienced riders.

The package includes essential components like a carburetor kit, exhaust pipe kit, chain and sprocket, throttle kit, and wiring harness, which makes it a comprehensive replacement or upgrade option for various popular bikes. One of its standout features is the standardized mounting points, ensuring compatibility with various monkey/dax/supercub/pitbike models. However, users are advised to check the mounting hole spacing before purchasing to avoid compatibility issues.

With adequate power for most trail and dirt bikes, this engine is cooled by air, which is generally sufficient for typical usage but may not be ideal for very long, high-intensity rides. This engine is a solid choice for those looking to replace or upgrade their pit-bike engine, but it might not suit those seeking maximum performance or advanced cooling systems.