Keep your eyes on your gears Andy, they seem to strip out for no reason. I thought i was lucky but it happened to me too and i was checking the engine screws and mounts, gears were meshed fine, kept checking right up to 5 minutes before mine stripped. just ordered the parts tonight, will fix over the weekend and see if i can see the problem. the parts are cheap, deal with chubbysdad on the forum here clearmontmotorsports.com . if he has it in stock he'll ship it next day and you will get it in a few days. also be careful of the pullstart, transmitter(if you have twitching send redcat email and get new one).