You will be fine running that tire, just remember that your right thumb will be your damage control ( IE if you keep it pinned when you get stuck you are likely going to break something) You will definately want to have a correctly shimmed belt ( keep it on the tight side). I am running an 04 650 with same tire and EPI pink and EPI black springs, very happy with this setup. Many local guys near me run the same springs in their 2005 with good luck. You can do a search for more info on the spring colors some like other colors for more aggressive stall, low end power. Good Luck