I have a 1990 Honda cr250 that for some reason will not idle. I have adjusted the idle screw all the way to the left and all the way to the right and still nothing. I am running a 32:1 mix with R1370NS needle set on 4, 180 main, and I started at 60 pilot and now currently at 65 with still no changes and the air screw usually at 1.5. is my pilot jet still just to small or could something else be causing it. I also live in north Carolina so pretty close to sea level. Any advice would be greatly appreciated thanks.