Cams for Kawi ?

Hey guys i am new to this forum. and new to the ATV world. I havn't riding any thing since i was in high school, but i jsut bought a pair of kfx 450r's and am workin on hoping one of them up. I orderd a pro circut full ti exaust and powercomander and am goin to do the ltz intake boot when it get hear. I am also goin to do a up one in the front gearing. .....
Now the point of this post. I am lookin at doing cams in one and have a few questions. how much will i gain with a stock head and stock size ? I eventually will do a big bore and head work but for now i am goin to do the above with cams and N2o for now. hear are the cams i was thinkin of doin.

http://atv.parts-unlimited.com/7/168

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