i have a 2007 vstar 650 custom. i bought it last year with 1000 miles on it. I have changed oil twice since and it has been my daily driver since. i rode it out to Sturgis last week. 400 miles out there and it ran fine. 300 miles in the black hills, fine. on the way back we hit rain with about 150 miles left. the bike seemed to lose a cylinder for 3 or 4 seconds and came back for about 4-5 seconds. went on this way for about 5 miles till the next town, getting slower and slower. i tried to adjust the plug wires and put fuel in. seems to run fine after that. today in dry weather it started it again. cut out and back. seems to be only one clyinder and only at highway speeds. what could it be.? fuel, fuel filter, electrical? i only added 2.9 gals of fuel so was not low of fuel.? i have 4700 miles on it now.