[Big Duke 6]

Hi, just wondered if anyone has any obvious things to check....bike starts right on the button (888 Strada), but if it dies for any reason while I am riding it won't start, and I can smell fuel..it will start if I leave it for 10 minutes. Also with full choke it used to idle around 2500-3000 rpm, now it barely ticks over at full choke, and when I ride it, it runs like a dog with the choke full, halfway or fully off, sort of hesitant. It has new NGK Iridium plugs and a new battery which always seems rather gutless...Thanks for any suggestions.