I normally spray my raptor down with Simple Green after every ride and then power wash it off. I have had no problems at all. I have also ran through deep water, well, it was up to my nuts when I had to hop off and walk it out, but it floats! I also don't have my pressure washer set to full steam, the only prob I've had is loosening some of the aftermarket stickers I put on. I wouldn't think twice about soaking that pig down, just put your airbox cover on and plug up that hole. If you're real worried, wrap up your air filter with a plastic bag.