Recently ran out of gas and washed bike for the 1st time on the same day. Since then bike has lag and inconsistency in the throttle (especially in low gears/lower speeds), sometimes cuts out completely in 1st gear, approaching a stop. Not sure if i got sediment from the very bottom of the tank into injectors or elsewhere or got some electrical components wet during the wash. I've only had this bike a week and a half. It's an '05, but well taken care of by prior owner (18,000 miles). It ran flawlessly for me until that day. I've put gas treatment and injector cleaner in a fresh tank of gas (premium) 2 days ago and took it on a 8-10 mile ride. Also blew air filter out and did a quick inspection on the throttle body. No real improvement. Any other suggestions? I want to take a look at the fuel filter, but have not gotten a chance yet.

 

Also, I changed the spark plugs, still no noticeable difference.