I bought this 1/16 scale for my son, after all the tanks of break in and taking the engine out many times just to clean the one way bearing with De-natured alchahol, it seems like the bearing is getting saturated from running too rich, every time I shut it down I have to take the bearing out and clean it just to get it to grab. I bought it from Nitro RCX(WILL NEVER BUY THERE AGAIN). Unfortunatly they are all out of one way bearings, is there someone out there that is having the same problem as I am? I have tried to lean it out, maybe I am not running lean enough.......don't know