With Honda leaving at the end of 2018, I hope they open up engine competition, but with rules similar to moto3:
*Snip*
Personally, I'd also like to see the spec changed to a 2-cylinder - 500cc. (Since motogp is 4-1000 and moto3 is 1-250) Not sure that will happen though.
Would be terrible to go to 500cc. Definitive downgrade from the 600's they have now. You'd either need to improve a parallel twin that's already in production or have to develop an entirely new motor from scratch. That would defeat the entire "make it cheaper for everyone" idea behind it...
Spec series should be left to the National level. This is world championship GP. You want the manufacturers, don't force them to use someone else's engines. KTM jumping into moto2 means one of two things to my mind. Either they're making a play to be the engine supplier; or they know something we don't (engine rules opening up). Hopefully the latter
Dorna was trying to avoid the situation in the 250cc days where there was only really one manufacturer that took it seriously for a while (Aprilia), they were expensive to lease, and Aprilia picked and chose what team got what equipment.
I am ok with multiple manufacturers, but I do hope they implement a cost cap for teams to get equipment. I also don't think either moto2 or moto3 are a place for factory teams.
Not sure if either is practically enforceable though.
Moto3: Antonelli joining Ajo next season. Good move for him.
Moto2 should stick to 600cc inline 4s but I'm good with multiple manufacturers building their own engines.
Navarro moves to Moto2!
http://www.motogp.com/en/news/2016/09/01/navarro-set-to-move-to-moto2/208872