If you decide to go the rub block route, think about what Jack just said. The chain will be tense on one side, the top during acceleration. That means the top will be slack during deceleration. You may find you need to add a rub block to the underside of the cover that you're gonna put on it to keep the chain from beating against that during downshifts.
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Chuck.
“Any suspension will work if you don’t let it.” - Colin Chapman
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