Repsol Honda's Casey Stoner has criticised MotoGP ringmaster Carmelo Ezpeleta over the decision to switch from 990cc engines in MotoGP to 800cc ones, adding it isn't the only poor choice the Spaniard has made.

Ezpeleta is head of Dorna, which owns the commerical rights to MotoGP, and works with the FIM, Motorcycle Sport Manufacturers' Association and IRTA to make sure MotoGP happens - but he is also concerned with making money to please owners Bridgepoint.

"He is pushing hard but he's not MSMA. He has pushed hard for a lot of changes that have been very bad, so he hasn't always made the right decisions, 800s are one of them - he is the one that says, 'OK, let's do it'. He was advised by a lot of people that (800s) was the right way to go and now he is pushing with advice from the outside," said Stoner, speaking to bikesportnews.com.

"He is not an engineer and doesn't understand a lot of things. He is going to take advice but what advice is he taking? Having a panel of people wouldn't work very well either, there would be too many feuds. People teaming up against other people, all kinds of things like that. Things were a lot more simple when it was a 500cc two-stroke."