I bought one of these for my F650GS (2002). What a difference they make. In comparison the original headlight bulb is like a candle in the wind - this Xenon bulb lit the way ahead brilliantly. I recently completed the Rusty Nuts Grand Challenge in New Zealand - 1000 miles in 24 hours - we rode through the night on very windy and dark country roads and the headlight lived up to expectation and more!
Only thing I would say is buy extra cable ties - on my bike at least there is very little room to stow the ballast and extra powerplant - consequently install was a lot longer than the 60-90 mins suggested.Rating: [5 of 5 Stars!]