I returned from a trip from the Black Hills this weekend, and the bike ran fine the whole time. Rode in a little rain while there. On monday I had to take it on some business and rode about 100 miles in a light rain, On the way back home, it stopped raining, and I filled with gas at a convenience store about 30 miles from home. They pump a lot of gas. It ran fine the rest of the way home. I didn't ride on Tuesday. Wednesday night I went for a ride and the bike ran rough. It idled OK, but lacked power and the exhaust noise seemed louder than normal. It almost seemed like I got a bad tank of gas. Any suggestions?