Hi. Just trying to scratch up some info on my 2003 grizzly 660.
I have altered the air box and fitted a raptor cam and valve springs. I put on a hmf slip on and re jetted it. But it still wont rev hard enough, i can only pull about 60 mph. could i put a raptor cdi unit on it, are they interchangeable and would this make it rev out a bit more. if not is there an after market rev box i can get.

 

hey mick had do you like that hmy pipe i have and 04 grizzly and i wanted to get a pipe and rejetted too, i was also lookin at those cdi/rev limiters but i haven't much about them. I have seen a couple on e bay though for like 120 or 30