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Old 08-09-2008, 11:59 AM   #8 (permalink)
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Join Date: May 2008
Location: South Dakota
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GMC Sonoma - '94 GMC Sonoma
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Originally Posted by dcb View Post
regarding the chain, I just kept the original chain and front sprocket and shortened it by eye with the new rear sprocket in place. They have special tools for breaking chains, but I managed with a c-clamp and a socket and some swearing (and a new master link)
My preferred way to shorten a chain was to grind the heads off of two pins with a grindstone. Then a small hammer and punch will easily push that pair of pins through. We had a chain breaking tool at the shop I worked at but I never used it. Grindstone worked better.

Also, if you do not have the option of changing the front sprocket, the math that I pointed out above can be simplified. Just consider that if you put on a rear sprocket that is 10 percent smaller, for instance, than your existing sprocket you will raise the speed of the bike 10 percent at a given RPM, that simple.
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