John: Beautiful bikes! We once had an 87 Audi that randomly blew the power window fuse to front passenger door. New fuse & it was fine until it failed again. Multiple unsuccessful attempts by me & others found nothing.
Finally, while replacing the window motor, I discovered its power wire was just long enough to rub the inside of the door & wore through insulation in that spot. Bare wire then touched door metal only in a hard left turn. Fuse would then blow. Replaced with new, shorter wire & problem solved. Don