Posted April 25, 2009 been a month or two since i posted. 2005 yfz 450. k and n filter, 15 tooth front sprocket, air box lid off, jetted carb, degreed exhaust cam back, gytr rev box, yosh pipe.....93 mph. very very strong. getting ready to upgrade to 07 clutch cover, oil squirter, and oil pump so i can go high compression. i'm completely hooked. this is my first quad....lol. Share this post Link to post Share on other sites Like what you are reading? Please help us by sharing this content.