A. This small sprocket (also known as the "small flywheel") for small high-speed racing car engines is designed for off-road motorcycle modifications. It has good performance and is available in various specifications. B. In terms of design, it has an exquisite structure and can well meet the modification needs of off-road motorcycles, providing strong support for the power transmission and performance improvement of motorcycles. C. 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. D. In terms of specifications, there are multiple options for different numbers of teeth 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.