Yes, yellow.
An unexpected sight.
On U.S. 522 southbound, about four miles north of Winchester, Virginia, at 4:20 EDST or so p.m. today (Mon, 31 Aug).
The guy was traveling LD, as he had bags of some sort and gear on the pillion post.
This wasn't a "mightabeen" or "couldabeen," but a Griso. Unmistakable sound, too.
Did have some sort of smallish "shark's jaw" or flame decal on tank. Didn't get a good look at tank as I was focusing on engine to be sure and I was across the median.
Would have given chase but I was in my beloved POS 93 Toy pickup -- which can barely keep up with its front bumper -- and I was hauling a 1L water tank. Empty, as full would have had my tailgate on the pavement!
Wonder who that was.
Bill