hi, i have and 85 atc 250r. im sick of the 34 round i have..it has a 140 main and 48 pilot at 40:1 H1R synthetic, with only a fatty pipe, open air box, silencer, and boyesen reeds..runs good when i have a new plug in it, if you put to much with it, it fouls..it hasnt ever ran this rich before the whole engine rebuild, its broken it also..i dont get why it dosent really smoke too bad...but it sounds rich, like the poping sound at a high rpm, but theres not really smoke comming out. should i try the 135 jett? anyways...plse help thanks