I have the V-Force Reed cage and carbon reeds on my 03 YZ250 and it was a huge improvement over the stock setup. The bike mostly runs in the High Desert in So Cal, but works great in the tight trees and rocky technical stuff as well. This is not a cheap mod and the reeds will wear a little faster depending on how hard you are on the throttle. I have done other mods to the bike to go alone with the reed cage, but I have gained power from the the bottom to the top with this setup. It is a lot snappier and it has quick throttle response.