"Dynojet also has a set of maps that you will get on a CD with your programmer, and can also download more from their website. I am currently running a custom map for my modifications. When tuned just right I was able to get 3-4 more HP from my quad. But dont trust just anyone to do this for you. Many people can tune your quad for you to get max HP, but you could be putting your motor in serious danger. I could get more power from my programming, but Im running a safe fuel to air ratio..."
Click on the photo in the blog, and it will take you to more on this project -
YFZ450R Tuning Upgrade - My Off-Road Blog post - Off_Road Community