A. This small sprocket and chainring for small racing motorcycle engines are specifically designed for off-road motorcycle modifications. They offer excellent performance and come in a variety of specifications. B. In terms of design, they have a delicate structure, which can well meet the modification needs of off-road motorcycles and provide strong support for the motorcycle's power transmission and performance improvement. C. They have a relatively wide range of applications and are suitable for various off-road motorcycle modification scenarios. They can effectively enhance the motorcycle's power output, allowing riders to experience stronger power and smoother handling during off-road rides. D. In terms of specifications, the 420 type offers a variety of options with different tooth numbers and sizes, where the tooth number of the 420 type ranges from 10 to 19 teeth. Whether you are looking for specific power performance or to meet different modification needs, you can find suitable small sprockets and chainrings here. They are quite popular in regions such as Africa, Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East, and are a good choice for off-road motorcycle enthusiasts to make modifications.