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Toying the idea of installing a rotrex on my 3.2 24v. If I have everything balanced, then I add the SC pulley, isn't that going to make my bottom end now un balanced? Unless of course, the SC belt can be used with the stock crank pulley's ribbed belt setup (164 24v pulley I think).

It won't effect the balancing. The factory pulley has offset weights in it to match up with the crank and flywheel weights, but the supercharger pulley is symmetrical so it doesn't alter the offset weight.

Greg