Got a 1986 trx250r with a 1989 cr500 motor. It has a pj38 carb on it. Jetting is a 168 main and a 55 pilot. My question is why is it so hard to start and why can't I use my choke plunger anymore? My choke plunger is adjusted all the way out (counter clockwise) for it to idle. The air screw is 3/4 turns out (counter clockwise). Runs good high rpm and mid range. Doesn't really hesitate off idle. It seems rich. It smokes heavy and the plugs pretty dark. Does adjusting the choke plunger out add more fuel or more air to the idle circuit? How about the pilot jet? It has a trx11 pipe on it and a k&n pod. Runs on 93 mixed at 32:1. Considering upgrading to a 38 air striker but I wanted to try to get this dialed in better before I spend the money and have to start over completely.