The power valve cover adds a little bottom end power, and the power wing adds a little throttle responce at low rpm, if the '07 has a kie-hen airstriker carb then these would both fit your bike, i'll find out on postage and get back.
I am keen for the powervalve but will get back to you tonight, have to pass it with the other half.Would postage still be 40 usd with just PV?
Cheers Mark