Congrats to RoHorn, who was the first to guess that this rear set belongs to a Honda RC213V-S!
It’s truly an incredible bike – I had a chance to ride one on the street a few weeks ago:
We brought one (with the race kit) out to Barber this past week for the owner to enjoy on the track, and he let one of our mechanics (Olly) take it out for a few laps as well! Here’s a screen capture I got from my GoPro while following Olly on my Kramer: