Originally Posted by
lunaticfringe
^^^ ^^^ not mentioned in any manual or TSB but always recommended by the belt manufacturers who clearly know what's best for their products. and it goes like this:
1- with new belt installed ride gently for a mile or so and find a stretch of unencumbered fairly flat road.
2-on an XB using 2nd OR 3rd gear....whatever gearing works best for the stretch of road that you're on...run that gear from approx. 2500rpm to approx. 5000rpm at 2/3rd's throttle......chop the throttle....let the bike return down to approx. 2500rpm....then accelerate again. doing this 4-5 times in a row sets the belt tension, runs it in, and stretches to correct service tension.
that's the best i can describe it.