I did the montauk century with my 48cc engine bicycle from Queens NY to Montauk and back on 5-21-06all together 220 miles and I broke three spokes all on the cluster side or right side and I think that the kick of the engine causes these spokes to break because it happens only to the pulling spokes as opposed to the pushing spokes. so now I think I will loosen up the spokes on the cluster side a bit to see what happens.