410 A 54 Tooth Sprocket with the center machined so a LEFT or RIGHT hand flange type freewheel will bolt in the center of the sprocket.
We took a # 41 A sprocket and milled down the teeth to make a 410 that will use 1/2" x 1/8" chain, opened the ID to 2.13" and drilled the 5 hole pattern for the 5mm x .80 bolts.
Zinc Plated after machining.
