Tonight was really a new adventure in riding in the rain. Its been absolutely dumping in Seattle and tonight on the way home I really felt like I had to ford two rivers on my route. The deepest water I went through probably came up above the rim lip on the tires. It wasn't until I was already in it that I thought that maybe it wasn't the best idea. But I made it through and crossed another couple big swaths of standing water without incident.
I doubt you want to get the exhaust beneath the water line, but this Stella is already about 100X more weather-stable than my old Passport with the cracked airbox.