Headlight keeps burning out

I have a '06 WR450 and am having a problem with the headlight. The bulb was burned out so I replaced it. It worked when at idle, but quickly burned out when I went for a ride around the block. I checked the voltage going to the light and it was ~ 15V at idle, but goes up above 20V with engine rpms. I'm guessing I have a problem with the regulator? Anyone had a similar issue?

Search this forum for = Voltage Regulator!

Too many good posts to list for you here!

Check AC voltage at the Head light plug if > 14.5 when motor is reved then Voltage Regulator is suspect. You Should check for bad ground and other bad connections before replacing regulator.

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