There will come a time when 800cc will be deemed too fast... For: Light weight. Less wheelie-prone What tight chicane? Two-handed punch-ups at last-corner-clincher no longer un-achievable. Acceleration of sufficient strength to see God. As he's taking a piss. Reduced danger of snagging front-brake lever away from the grid. Less costly to run a team. Or pay the norm but have six riders. Against: Rubbering the grid-box problematic. Acceleration weight-transfer. Braking weight-transfer. Bad to bump-start (even harder with assistance). Sponsor-space issues. Aprés-race nac-nacs for the brave only. Space issues regarding the paddock-stand.