Just found this thread and thought I'd chime in. I have an '09 800 also and I am on my 4th set of steering head bearings in 40000km's so I'm having the same issue. Tried 2 different brands of bearings so far, made no difference. Currently waiting for the bike to get back from Russia, when it does, I'll be going over it with a magnifying glass trying to find any earth leakage to see if that is the problem. If I don't find anything then I'll just continue to ride the hell out of it and replace them every 12000km's, which is how long it takes them to wear out. I should know something in about 2 weeks, I'll keep you posted.