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Old 04-24-2010, 06:20 AM
Gator Wrestler Gator Wrestler is offline
Motorized Bicycle Elite Member
Join Date: Jan 2009
Location: Springfield LA
Posts: 124
Default Re: Sprocket Enlargment Help

I have enlarged a couple of sprocket holes using a pair of round files. I chucked one in a power drill and held the other by hand. With the drill at full power I placed the sprocket hole on to the spinning file. The sprocket will spin. The other round file is used at the bottom of the hole. While the drill with file is spinning the sprocket from the top use the other file to file the bottom of the hole. It's not easy but worked fine for me. This removes metal at a rather slow pace allowing you to stop often and get the hole just big enough. This aids in proper alignment.
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