any chance a slip on from a 450r would slip onto th 700xx ??

I've been wondering the same thing. I could get one really cheap, but haven't been able to look at it yet.

i tried to look today at the atv shop but didnt get a good comparison between the two, it looks as if it would but... i dont have the money for trial and error, and if it did would it help or or hinder the performance

I wouldn't think it would hinder your performance. You are going to get better air flow. Although, I would definitely recommend a EFI controller to be installed if you are really planning on getting the most out of it.

well some one with a 450r, or any one with the chance to look please shed some light on this for us

if it helps any one out, go to this link and click on "slip on for honda 450r" their is a diagram with pictures this should help any one with mechanical skills out

actully here is a direct link to what you need to look at http://www.motoworks.com/05technical/01install_inst/img/sr4_isheets/60-1001.pdf