The oil drain plug is on the front of the motor below the oil filter.
Yes, it is. However, there is separate gear oil in the final drive of the Goldwing, as it is shaft driven.
Any lower on those models, and the pipes will hit the road around the corners.
586.4 pounds (dry) (Ref: http://www.motorbikes.be/en/Honda/1981/GL%201100%20Innerstate%20Gold%20Wing/) Hot2MtnBike
.028"
yes and no, it has a glass indicator window but no dip stick
The fuse box on a 1981 GL1100 Goldwing is located under the seat near the battery. It is sealed in a water tight box to prevent damage.
If I remember correctly, the rad. cap in in the lower front corner. If you remove the tray on top of the air filter, look in the front right lower corner.
87 octane should do fine. If you find it knocks a little then go to 89 octane. You can always use 91 octane, won't hurt, just in the pocket book.
Goldwing hands down...
go to: www.goldwingdocs.com
Try this...... http://www.crc2onlinecatalog.com/master_cyl_rebuild_guide.htm
Follow the lower rad. hose. Its in there. Have to remove the rad.