For the 1st 15min of the ride, my 2003 V-Star 1100 sputters as I try to accelerate. To the point of almost losing all power and stalling. No stall yet, but close. This has happened the last three days. Also, I just filled up 3 days ago from a very low tank. Any ideas? Bad gas, bad plugs, gummy lines? I hope to get into it tonight, but would be helpful to have some direction. Thanks for any suggestions.