Has anybody that's running an AVS single cylinder broken a crank gear yet? My son broke one in his over the weekend. They look pretty chinsy, and they are pretty thin, because the AVS crank has a lot bigger journal on the bottom where it goes through the oil pan and the OD of the gear is the same as a regular gear. I think maybe they are powdered metal, with a thin steel band fused to the inside circumference. Does anybody make a steel gear to fit the AVS motor?