heres a test for you...

http://www.youtube.com/watch?v=oqMc1q_dEGc

Nice, they will run through a monsoon without a hic up

Presumably the battery isn't mounted in the same place as the SD

Very often I pass though kneedeep water to cool the engine down, especially after a hard blast. But further more I wear e blacked visor helmet when I exceed ankle deep water it helps not to drown and I always wear a wind proof jacket at any occasion of speeds up to 15kmph indoors.
Chinqui