I bought the bike about 3 months ago from the original owner. Don't know of any jetting mods. Had canisterectomy and has Leo Vince pipes. The bike will just intermittently stall at idle as if I turn the key off. Starts right back up and runs fine but if I let it idle long enough it will do it again. If I ride real easy I can get just about 30 mpg from fill up until the light come on. Went on a ride up to Big Bear this past Sunday and at higher elevation it would stall all the time at idle. Also starts right up every morning cold without using the choke. Only thing I have tried was syncing the carbs. Any suggestions please.