I have an 07 600RR. Short velocity stacks, Power commander and Stock sprockets and chain.

I like the Faster response from the Velocity Stacks but miss the top end. I am thinking going to all tall stacks and +2 in the rear. I will loose about 10 MPH on the top but it should pull all the way through instead of dropping off at around 120's. +1 in the rear I don't think will be enough and -1/+2 I think will keep me in the current situation. I am stuck at debating what will be best.

Any ideas or reccomendations???

And yes no one needs to do 160+ in city streets I know this.

 

I didnt realize velocity stacks would comprimise your top end. Do you have your powercommder tuned correctly? I would assume maybe your tune is not allowing enough fuel in the upper rpms?

Before I spent more money on bandaids, I would spend the money and get the bike professionally dyno tuned. Downloaded maps are ok to get the bike running. But an actual tune for your bike is the best way to go. You'd be suprised at how much power can be unlocked by being on a perfect tune. Not only max power will be increased, your fueling throughout the rpm range will be set correctly as well, which will correct the bad fueling in the upper rpms that I think you have.

If you already have a dyno tune for your current set up, I don't know what the answer would be. Going up in the rear on your sprocket will not help you once your going 120. Its mainly going to help get the power down sooner, thats really it.