420 Chain 14 Tooth Engine Sprocket for 50 cc 70cc 90 cc 110CC 125 cc ATVs Quad 4 Wheelers Dirt Bikes Go Karts 14 Tooth Engine Sprocket. Top Quality Guaranteed. New 420 Chain 14 Tooth Front Engine Sprocket Compatible with 50cc-125cc Horizontal Engine and Lifan 125-150cc Oil Cooled Engine. Thit won't fit Honda stock engine It can fit 50-125cc ATVs, Dirt Bikes & Go Karts, 150cc Dirt Bikes, and some Honda XR/CRF Style 50cc-125cc pit bikes with Horizontal Engine may fit; Inside Diameter:17mm; Bolt hole spacing: 30mm