My previous bike was a 03 yz250r and i hardly ever used the clutch. I tried this on my 04yz450f and it seemed to not work as well almost seemed like it might be doing some damage. When i shifted up it felt great then i down shifted and it felt bad. Is there any diff. when not using your clutch in a 2-stroke vs a 4-stroke. And the problem with my bike dying was fixed today it was the air/fuel screw. Im a full 2 turns out now thanks for whoever suggested going 2 turns out.