He already has a kstar, and the boss is fine. Not ideal especially if your running a stock crank. I recommend 17/45 gearing at the tallest unless you never see a hill then your gear ok. I would recommend a 19phbg and the little cheapie square port intake, it fits under the side covers and you can squeeze the mallossi e12 air filter in there too. The only bummer is you have to remove the intake to change jets and it could stand to be lapped on the flange.