Has anyone actually tried a 428 O Ring chain on an 85 cc bike? My son's YZ is eating up chain s like crazy. The muddy conditions are rough on these things, I know, but he only got about 4 rides on the last RK chain I put on. I just ordered an O Ring for it and gonna try it. At the rate of wear on standard, I'm not sure he will be able to finish a H/S this coming weekend.