The concessions for next season provided by Dorna will only apply to Asian manufacturers such as Honda and Yamaha. Meanwhile, other European manufacturers are not given any, so what makes it even more difficult next season is that manufacturers such as Aprilia and KTM both have no concessions. However, both of them are still competitive enough to fight Ducati next season with a level of success that may not be too great, because Ducati not only has a powerful engine, but also has quite talented riders.
That's not quite true, next season there will be a total of four groups, Group A, B, C and Group D.
Ducati is in Group A, KTM and Aprilia in Group C and the Japanese manufacturers in Group D.
Group A
A manufacturer in rank A will have to have scored at least 85% of possible maximum constructors' points to be classed as such, and will then have 170 test tyres, private testing with test riders only at only three GP circuits, no wildcards, a maximum of eight engines per year and a freeze on development as well as only one aero update per year.
Group B and C
For a B rank, the points percentage must be less than 85% but greater than 60%, while for C it must be less than 60% and greater than 35%. For D rank, it's less than 35%.
B and C-ranked marques will be subject to the same testing limits, engine number, development freeze and aero updates as A rank, but can have three and six wildcards respectively.
They will also have 190 and 220 test tyres.
Group D
For D-ranked manufacturers, they will be permitted to 260 test tyres, testing at any GP circuit, six wildcards, testing with race riders and a maximum of 10 engines which can be freely developed and two aero updates per year.
If a manufacturer changes rank during the second window mentioned above, the concessions will be adjusted accordingly to reflect this.
https://www.motorsport.com/motogp/news/motogp-confirms-concession-plans-for-the-2024-season/10552831/