1. This small sprocket (also known as the "small flywheel") for small high-speed racing car engines is designed for off-road motorcycle modification. It has excellent performance and is available in a variety of specifications. 2. In terms of design, it has a delicate structure and can well meet the modification needs of off-road motorcycles, providing strong support for the power transmission and performance improvement of motorcycles. 3. It has a wide range of uses and is suitable for various off-road motorcycle modification scenarios. It can effectively improve the power output of motorcycles, allowing riders to experience stronger power and smoother handling during off-road riding. 4. In terms of specifications, there are multiple options of different tooth numbers and sizes for the 420 type, including 10 - 19 teeth for the 420 type. Whether you are pursuing specific power performance or meeting different modification requirements, you can find a suitable small sprocket here. It is quite popular in regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and is a good choice for off-road motorcycle enthusiasts to make modifications.