I've ridden my GS/Adv through muddy puddles where the water came up over the jugs (BTW, it goes from 6 bars to 3 in literally a couple of seconds - can't beat watercooling.) I've also crossed deep, but narrow, creeks with clear water, so I could inspect the bottom before plunging. I check the drain plug every time after crossing deep water, but thus far the water never seemed to have gotten into the air box. I attribute it to the wave that the bike pushes just ahead of it. The trough that follows the wave happens to be approximately near the jugs, and therefore clears the air intake. Last Sunday I was riding with another two friends. We came up to a fairly wide river crossing where we'd have to drive through deep water for a relatively long stretch - maybe 20 yards where you couldn't see the bottom. After walking around and feeling the bottom with a stick, we decided that the F650 could probably make it, but the two GS's had air intakes that were too low for the depth ahead. So, we turned around. And again we turned around on a couple of unmaintained powerline trails in Maine where there were relatively deeps and large bodies of water with "questionable" surface at the bottom. I hate turning back. So, yesterday I went to the store and bought a couple of hose clamps, some couplings, and a length 1.5" sump pump hose. Last night I've fitted the hose to the snorkel, so that now the air intake is located just above the dashboard. I wanted to test the performance implications with this mod as is before I went all out and sealed the airbox. It isn't pretty, but looks utilitarian and not out of place on the big GS. I'll post pictures by tomorrow, but I probably won't get to test this setup for another couple of weeks. The bike still power-wheelies in 1st and bump-0wheelies in 2nd. I got up to 100mph in a reasonable amount of time before running out of road. The air intake noise at hard acceleration actually drowns out the knobbies - an big plus. More info to follow after I take the pics. Then more to follow after I seal the box and return to that river crossing. -- Ilya P.S.: Anyone done something similar? Got any hints?