Where can I get a modified cdi box for a 300ex need to get rid of rev limiter or will one for a 400ex work on my 300

 

Yeah, I got the same problem. I always hit my rev limiter with my 300EX and it pisses me off. I doubt a 400EX rev box will work but I've heard that a 300 4x4 box will work on a 300EX. Otherwise I would say try Whitebrothers.

 

TC Racing, Four Stroke Tech, and Pro Fab ATV will all modify a CDI box from a 300EX for about $75. Unlike the White Bros. box for the 400EX, they only remove the restrictive rev limiter, they do not change the timing curve.

You can get their phone numbers from any of the ATV Mags out there. If you can't find them, let me know.

Heavy J