My '03 WR250 has all std mods done; plus had YZ cam put in and YZ exhaust. Acquired a low-end bog that I couldn't resolve, so had a Zip-Ty jet kit installed. Bog still persists, plus big-time popping when backing off. Warms up nice at idle with choke, but when warm w/o choke it sputters/coughs and only performs at high rpms. What I have now: pj: 42 paj: 75 needle/pos: #factry3 mj: 145 maj: xx115mm I live at 3,000 ft elevation. I'm getting ready to buy a used carb if I can't jet my way out of this.... Arggh. Ideas?