i have a 2001 rm 125 with a bills pipe on it. it had stock jets 460 main and 27.5 pilot and i am all the way down to a 390 main and still getting some spooge dripping fron my silencer. i went out on the air screw about 2 turns and it seems to be somewhat better but still has that cut out and sputtering just before you start to get into the pipe good so any ideas of why this thing wants to run so rich even though i have droped from a 460 stock main down to a 390 that is quite a drop. my gas is 94 octane with klotz techniplate 32:1 mix. this thing should run like a scared bear with turpintine in its ass, but not quite there yet help me please thanks mark