hi, i have a KDX250 about a 93-94 model and it runs for about 1/2 hour on a brand new plug then just dies.... I take the plug out and clean it, I put the plug back in and it starts but its real smokey and just dies after 30-40 secs i have tried with hotter plugs etc but dont know where its going wrong. the mix im doing is just about 50:1 and it still smokes like a bitch.....
