Starting and idling have to do with the pilot jet and valve adjustment. A 35 pilot is stock and might have to go to 38. My Yerf required a stock pilot, but 140 main to run properly. If you cannot get good starting and idle with a 35 or 38 pilot, I suggest going back over the valve timing and lash and looking for intake or exhaust leaks.
Last edited by GX150; 05-29-2012 at 10:45 AM.
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