13 TOOTH 420 PITCH PIT DIRT BIKE 17mm FRONT SPROCKET 140cc 150cc & 160cc PITBIKE. 12 TOOTH 428 PITCH PIT DIRT BIKE 17mm FRONT SPROCKET 140cc 150cc 160cc PITBIKE. Based in Cornwall, Red Circles Motorcycles is the largest importer and distributor of specialist Minibike parts in the UK.
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