I have an 05 wr450, stock gearing, fmf pipe, etc... I ride in enduros, hare n hounds, etc... in the socal desert. I also do dual sport rides, but mostly technical stuff. I often find myself riding in high rpm second or low rpm third gear. I am always clicking between 2nd and 3rd to try to keep the engine spinning at rpm's that will still give me some accelleration. But I end up shifting too much. If I go to a 13 tooth counter sprocket, I am thinking that I will have a little more pull when in low rpm third and can acclerate better. This way I can lug it more in third and then accelerate when I have to. But... will it make 1st gear worthless for me? What will it do to my overall top end (that I rarely use anyways). What will be the effect on gas mileage? Thanks.