Well, my carb was leaking gas out the tube, and so I took it off and cleaned everything out. The needle valve looked worn, but I put it back in and the bike didn't pour premix out like it had been doing. But the other day, I looked in the garage and there was a small puddle of gas under the tube, so I decided to just go ahead and rebuild the carb. I cannot find a rebuild kit ANYWHERE! Can anyone help? It's an '04 KTM 250 EXC.