I cant seem to get my jetting right. I have a 2002 Yz250 with a FMF SST pipe and a FMF Shorty silencer. I am runn at 6000-7000 feet at about 60-70 degrees. 175 main 45 piolot clip is in 4th position(top) air screw is 1 turn out The bike is smoking a lot and getting an oil build up on the plugs. Any advice would be appriciated. Thanks .