I did have an issue 2 years ago with the HIGH/LOW switch. When I flipped it to high, no lights at all! Bad at 2am in a canyon. I did take the switch apart and found no corrosion, dirt or signs of moisture. Reassembled and no problems since. Did the same yesterday and found the same non-issues. Just seems strange that I'm having these problems after taking everything apart for the head gasket. And the low beams did work when I took the bike to work 3 weeks ago. But I will try the dielectric contact cleaner.