I am kinda stuck. I am running a 240 kit with a 3 mm stroker and full fmf exhaust with stock carb. I cant get my jetting right. I was running a 340 main and it was running really rich. So i went down to a 330 and now i am really lean and it wont stay running unless i feather the throttle. I have adjusted the needle with both jets and cant seem to get it running right. Any suggestions would be greatly appreciated.