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Old 11-10-2010, 05:18 PM
Gator Wrestler Gator Wrestler is offline
Motorized Bicycle Elite Member
Join Date: Jan 2009
Location: Springfield LA
Posts: 124
Default Re: gear won't fit around coaster brake arm

I have developed a method of enlarging the sprocket hole that is quick and accurate.
I use a power hand drill with a round file chucked into it. The sprocket hole is placed over the round file and using the other hand to hold another file (I use a curved one) the drill is run at a high speed. The sprocket is allowed to spin and the action of both files on opposing sides of the hole quickly enlarge the hole. Don't forget your safety glasses.

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