after 41k miles through all kinds of rain, my O2' TBA finally sputtered, back-fired and stalled...re-fired, went another 2 miles in driving rain and finally went dead and I coasted to a stop.. made me leery of going in rain..it dried out on it's own and fired...had all connections "re?" greased with dilectric grease to stave off "wetness" and it lasted for another almost 5k miles till I washed it.. I think it's the electronic igniters under the tank getting wet.