Figured I'd update this one.
As things turned out the bike was an s200 not an s150.
I ran Michelin City Grips, 100/80 16, & 120/80 16.
Odo, was pretty much dead on. Speedo was a bit, (3-5%) optimistic.
Longevity. 4500 Highway miles and still life in the rear and front even with my fat butt, a set of tools, & 2 gallons of gas on the back.
Grip. They handled the Tail of the Dragon with ease, & at one point on the way to Pikeville TN I was riding in a winding road in a storm so hard that even the SUV behind me pulled over when I finally found some cover. I could not see 5 feet, & was driving the winding road by the white line, but no slip, no slide, just perfect traction.
Overall. I liked these on my HD200, & the long ride did nothing to convince me to look at anything else.