I just bought my first raptor 660 04. I just rode it for about 10 minutes in stock form. I put a dyno jet kit, pro form air cleanr kit, full CHM exhaust, air box mods, and stage i hot cam. The bike pulls great till what I would guess is around 6500 rpm and then levels out(stops pulling hard). Is this normal for 660 raptors or should they pull hard all the way? Any info would be helpfull.