Congratulations to Todd Trumbore, who was the first to correctly identify that this key is used to fire up the mighty six-cylinder heart of a Benelli Sei 900!
Now, it’s clear from all the other guesses that Moto Guzzi used a similar (if not identical) design on some of their 80s machines. I personally don’t have experience with them and a quick google search doesn’t show anything close enough to compare the folding heads. Any of you fine folks willing to take a photo of your matching Guzzi key to share for a comparison? You can either email me (firstname.lastname@example.org) or attach it to a comment below.
Got something that you think would make for a fun Guess That Bike feature? Send me an email!