Like most people, the only problems I have is with the engine and the half-tank leaning issue, but I've heard even the Savage does that. I'm still running the stock engine, until tax refunds come through
I've beaten my Warhead up pretty good and only came out with a busted front skid plate and broken engine mount (which ended up stripping the spur gear.. no biggie). Also, I'd recommend ditching reverse with the FOC shaft and getting the race steering kit mod to get more steering out of it.