CLASSIC 428 PIT DIRT BIKE 37 TOOTH REAR DRIVE SPROCKET 125cc 140cc 200cc PITBIKE. 17mm - 18 TOOTH / 420 PITCH PIT BIKE 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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