This is a brand new lightened 25 tooth rear miter box input sprocket for a Rokon 2 wheel drive motorcycle with an Albion Transmission. This is a lower than normal ratio sprocket for slow speed riding. This ratio also works well with my Comet 30 clutch conversions. It has both a 3/16″ wide keyway and a precision 1/4″ diameter hole for mounting on an original shaft or one of my extended miter box shafts. The sprocket is supplied with a new roll pin, 2 set screws and a number 606 woodruff key.