These front sprockets are used on the Chinese 50cc - 125cc engines. These sprockets are compatible with #420 chain only.
- #420 Chain Size
- Usually used on ATV's with a 7" rear wheel or smaller
- Choice of 12, 13, 14, 15, or 17 Tooth
- Fits 17mm shaft
- Requires a retainer to function properly. (Part Number: ZN61241-SR387-02)
- Will NOT fit Kazuma ATV's (90cc and under use #428 chain)
- May come with 2 or 4 bolt holes. (see 2nd image)
Be sure to measure your chain or current sprocket before ordering. 420 chain has a 1/2" pitch and a 5/16" roller diameter. Most Chinese sprockets have the chain size and tooth count stamped into the metal.