I have a 2001 sportsman 400 that just won’t seem to rev. I have been through the clutches, replaced the belt, rebuilt the carb, replaced (and tightened) spark plug, check compression 60lbs. It just doesn’t want to go. Originally I replaced the belt, plug and cleaned carb. and it ran fine, 5 minutes into it, power diminished. I rebuilt the carb and it still will not rev enough to make it move past 10mph or climb. It hardly will idle. I’m leaning on replacing the cdi next, any suggestions would be great.