I was using my 2006 Honda 400ex the other day and it was running really good, I let my friend use it and he stalled. When i got back on it, it would let go of the clutch alot just so it could start going, I almost had to let go all the lever, it would run on 1st gear and I would be able to shift, but it still feels like i am on 1st gear, I could probably shift all the way but it would still be on 1st gear. Thanks for your time, it is equipped with 440 big bore, fmf, stage 2 cdi box.