I Had an O.S. 82 in my microbust. After one season of running i replaced the bearings in it with ceramic bearings. The bearing i took out were worn but not too bad. I always after run my motors and use qaulity fuel. The ceramic bearings didnt last two months and i paid double for them than the original OS ones. Anyone else have problems with this type of bearing. I have a lot of nitro motors and change bearings every year to prevent one from coming apart. this is the first time i used ceramic. I'm thinking they are not worth it , anyone else use them.