hey man congrats on the 07 zx6r!! i have the same bike with the same amount of miles actually lol. a couple things with our year models is that engine wise they are smaller than the previous 03-04, 05-06 and future 09-12, 13-up so a couple things i plan and know will help is a full system exhaust because it will cut weight and add some hp. but with a full system you will need to buy a bazzaz or a power commander that will help to add a couple more hp. i would do a -1+2 sprocket change because the low end torque on our bikes isnt the best and the sprocket change will help! those are just a couple things