trailblazer im sure you have heard this b4 but with all the money your about to spend on modding your bike why dont you save your cash then sell the bike and get a different quad that will suit your needs better..it makes alot more sense...plus yuor only gonna get so much out of the trailblazer 250...on another note,,,theres a reason why you cant find a jetting kit....because no one mods these bikes... i know how you feel your probably saying " well this is the bike i have to work with...so im gonna mod this one.." but when you weigh it out your getting older and that thing is eventually going to out grow you if it already hasnt....