Hey y'all. I was just wondering, my girls 300ex is getting a little too slow for her, I up graded the rev box in my 400ex and still have the origional, can I just plug in the 400ex box into the 300 to get a slightly higher rev limit for her?

 

bump

 

i wouldnt thk it would work possabley blow the engine maybe depending how high the 400 revs compared to the 300.

 

No it will not. Just like a 350x wont work on the 250x. The wiring is different, but if you could figure that out then it prolly would, but rpm range is prolly about the same. Its just that the 300ex wont pull as hard to get close to the rev limiter.