So I have a 2003 Yamaha wolverine, and I'm looking to put an hmf slip on exhaust on it and right now im running stock jets with a k&n filter! So I was gonna buy my jets at jetsrus.com so if you guys could tell me what size pilot an main I need that would be great! Thanks a lot. Also anything else you can about jetting it. Oh an I'm at 4,000 ft. Above sea level if that helps!

 

not sure of what jetting you would need but....your pilot can usually stay the same because the amount of flow doesnt change much with the throttle barely open. your main youd want to go up a few sized do a WOT plug chop and see what you plug says, white=to lean black=to rich you want a nice tan color and also when you do your plug chop after your WOT pass all at once let go of throttle push shift lever up or down and hold it(does the same as holding a clutch in) and hit kill switch and coast to a stop with that clutch in (shift lever down or up) pull your plug and see what color it is and jet accordingly. ......also usually if you hit the throttle and the bike just dies its usually lean, if it strugglesand sputters at first then climbs up to full rpm its usually rich, as well as a backfire through the carb is lean hope this helps if u have a question ask