[2FastSS4U]

Well, I got my wheels and tires in friday, mounted them last night and went to drive it this morning, needless to say I'm pretty pissed off right now, my pinion gear keeps on falling off because there's no flat spot on the motor shaft, I'm guessing I got a lucky motor that didn't have one as I assume all Neu's have that flat spot. Can anyone help?

Edit: Oh yeah, and the pinion is gone.. lost forever and I've no idea what tooth count or size it is.. After spending this much money I'm kind of disappointed that I havent even gotten to run it for a full charget yet.