This auction is for a 5/8" shaft centrifugal clutch with 11 teeth, matching 10 ft.  #35 roller chain and matching sprocket with 60 teeth. The sprocket measures 7-1/4" in diameter and has a 2-1/8" center hole. I never used these items. They have been sitting on a shelf in my garage for years. Selling as a lot. Great for go cart projects or mini bikes. Thanks for looking.