ok i was looking at my axle on my yfz and i noticed the notches/splines on the back where the rear sprocket goes on, well the rear sprocket bolts to the thing thats on the axle, which is where the splines are,they are tweaked a little bit and i looked on the raptor and they arent like that and i havent looked at another yfz yet, but is this normal?

 

anyone?

 

No they are not supposed to be! Just like factory steering stems under enough abuse they can twist. I don't see it hurting anything until you want to replace the rear sprocket. But you must be tourqing it pretty good, you might want to consider aftermarket. Looks like a pretty potent motor you have is your culprit.

 

well u can replace the sprocket w/o having to take that part off, but it also wasnt my built motor that did it, it was the stock motor, and wut axle would u recomend and how much do they run for?