i looking to get more power out of my 450 kodiak, i have the pipe jet filter and got a little more low end snap out of it. the confusion i have is a lot of posts say the hauck machined sheave gives you only top end and then others saying it gives both low end and top end, im not sure if the claim of more low end power are from the people that have both the sheave work and spring kits. i would like to do just one and not both. i run factory tires and do mostly trail and dune riding. any one with just the machined sheave?