Just an update on replacing bulbs. It is not necesarely as easy as unscrewing the bulb as stated elsewhere on this post. On my 94 HDJ80 the bulbs are fixed with a spring that has to be removed. And the spring is located under a rubber seal that is not easy to remove from inside engine department, not to mention insert it again.
After struggeling from inside I had do take out the complete headlight assembly. Here is how:
Unscrew 4 10 mm bolts. Two on the top, one bheind the blinker and one behind the sidelight.
Loosen the grille. Two screws on top, one inside the grille on the headlight side and one clips in the middle. Bend the grille as much as possible, without breaking it. Fiddle the headlight partly out. Done in half an hour.