Thanks for all of the input. I will try to respond to all questions. I am running traxxas 20%, The engine fires as soon as the roto spins if the bearing grabs, and I don't think I am running to rich. I leaned it out until I lost power at wide open and then I richened it up slightly. Hpi...
OK guys I have a 25 , a 4.6 , and I just got an XL. I can't seem to keep the oneway bearing in the XL working. It has the internal style bearing unlike my 25 and 4.6. Hpi has already sent me a new one and after about two tanks it slips so bad I can't get it started, which is really ashame...