I was riding home today & the bike felt like it was wanting to die at a couple traffic lights. I thought it was getting close to needing to flip on the left reserver petcock & when it did die on a downhill, I flipped the reserve on, but about 200yds later it died again. I opened the tank & there was still a tiny amount of gas in there that I could hear swishing around. Wouldn't it have run dry before cutting out & how come the reserve didn't work at all? Anyway, AAA happened to drive by, filled me up & it started again. I don't quite get why that gas was still in there & it cut out.