Honda RC213V 2020 prototype (Marc Marquez)
David Emmett: You can tell this bike belongs to Marc Márquez by looking at the rear brake disc. The ventilated disc is a sign that it gets heavy use, and needs a lot of cooling.
This was one of the prototypes used by Márquez at Valencia, but the chassis is a tell that this was just being used to test the new engine. The frame still has the engine mount spar above the clutch (the section the fairing is attached to, by the bolt just behind the R of Repsol). At Valencia and Jerez, Márquez tested a chassis without that bolt, giving the frame a little more flex.