I have an 01 warrior, I wanted to wake the bike up a bit and installed a K&N with clamp kit as well as removed the airbox lid. For the life of me I cant get it dialed in, I live at 1300ft and based on dynojet with what I had done on the bike the instructions stated install their needle valve and set on position 4, as well as install main jet DG146 and set fuel screw at 2.5 turns. Bike is now difficult to start and has a hanging idle, if I blip the throttle it takes several seconds to saddle back down to a reasonable rpm, replaced plug and turned fuel screw out another half turn which seemed to minimize the hanging rpm but pulled my plug after idling about 10 minutes and just putting around and it was clean with a white tip. Main jet circuit seems okay it has good power and doesnt seem to cut out. The fuel screw seems to have very little affect on idle now, only way to lower it is with idle adjustment screw. Dynojet swore I didnt need to up the pilot but I think that's my issue, ordered a 45 and am hoping that helps the situation.