A huge change to the motorcycles then, read here: https://www.crash.net/motogp/news/1048005/1/motogp-confirms-2027-regulations-here-they-are Really puts Yamaha and Honda on the back foot for the next few seasons. Playing catch up with bikes that will be completely obsolete in a couple of seasons. Plus point I suppose, not electric!
So we keep aero by and large but ditch an engine to reduce costs. Makes little sense to me but it is what it is I guess.
2.4.4.1 Minimum weight The minimum bike weight in the MotoGP class will be 153kg. 16kg lighter than my 899