1st Guess: Water from rain got past the gas cap, you now have H2O settled in the bottom of your tank.
A: Empty gas tank. Fill w/fresh.
2nd Less Possible Guess: Water managed to get into your airbox.
A: Empty gas tank. Lift-up and check the filter/airbox.
3rd: Find the thread about the TPS reset and try that.
Sport 1000 Biposto:
Paul Smith Fork Guard & Oil Cooler Guard, GTRossi Touring Hugger, Fat Duc O2, Fastbike Fork Frame Swingarm Sliders, Desmo Case Saver, Gerhart Gauge Lowering Bracket, Kuan Steering Damper, AG Hammer Fork Brace, Dobeck EJK, caCW Air Filters, TPO Idle Air & Crankcase Breather, Aella EVO.
2004 BMW R1100S BoxerCup Prep
2003 BMW R1150R
1996 BMW R1100GS