I ordered the product in hopes of being able to further dial in my 08 Kx 450F. I should have looked at the installation instructions first. It requires modification of the float bowl (a small hole drilled and the leak jet plugged). I thought it was bolt on. I'm hesitant to commit to the product (by modding the bowl) without knowing the results and not being able to go back without replacing the bowl. I'm interested in any first hand experience. Thanks.