My Raptor is dialed. The Dynojet recommended settings turned out to be right on. The throttle response is like a YZ426 but with a harder low end hit. It's snappy enough to break traction or wheelie you over backwards if you get ham fisted with it. The most noticeable differences are quicker throttle response and a big gain in low and midrange power. It may have gained a little peak power but definitely pulls longer on top. It revs higher too. I think an aftermarket cam would be just the thing to give it some more power on top but I'm pretty happy for now.

 

Mine is setup similar to yours, with the addition of Powerbomb header pipes and 146/148 jets. I think Dynojet kit is definetely worth the $80+ you pay.