Congrats to RoHorn, who was the first to identify that this belongs to a Yamaha Fazer (specifically a 700)!
Plus a thank you to Starmag for noting that I really should have titled this “Magnesium Valve Cover” Edition as opposed to Magnesium Head.
I encountered this bike on a Sunday ride (you can see the next post for more details on that). Here’s some other angles of the Fazer, if you’re interested: