FYI for anyone installing, the best way to tighten is to install a little tight, turn on and let engine idle while you loosen the tension. Once you get a rattle again as you loosen stop and tighten the bolt 1/4-1/2turn and set the stopnut. Easy and the oem way on some bikes. No need to rev the engine.
Might give this a try, easy enough to access on the '03.