Where is the oil drain plug on a 1981 GL1100 Honda goldwing?

The oil drain plug on a 1981 Honda GL1100 Goldwing is located on the bottom of the engine crankcase. It's fairly straightforward to locate but you'll need to get under the bike. It's likely to be a large bolt, possibly with a hex head.

Important Note: Before attempting any oil change, consult your owner's manual for specifics, including the correct type and amount of oil. The manual will have diagrams showing the exact location. Improper oil changes can damage your engine.