Double roller chain and underdrive pulley?
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Double roller chain and underdrive pulley?
I have a fast question. i have read that the asp underdrive pulley had to be modded to get it to work with the asp ud pulley. i have a rollmaster double chain on my 383 right now and im waiting to get an ud pulley for it. what has to be modified if any on the asp pulley for it to work?