39 TOOTH 420 PITCH CLASSIC PIT BIKE REAR SPROCKET Fits 50cc 110cc 125cc PITBIKES. 37 TOOTH 420 CLASSIC PIT BIKE REAR SPROCKET 50cc 110cc 125cc 140cc PITBIKE. Based in Cornwall, Red Circles Motorcycles is the largest importer and distributor of specialist Minibike parts in the UK.
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