Reigning World Superbike champion Carlos Checa is testing Ducati's GP12 MotoGP machine this week in a private session at Jerez, but team bosses have put the kibosh on any public comment - even on the new window to riders' minds, Twitter.

Checa was reported to focus on the handling of the redesigned, aluminum-frame machine, according to media reports.

The only comment on Checa's Twitter feed, @CarlosCheca7: "1st test this year recovering good feelings on bike, we are working well. I can't say so much, tomorrow more work. Ciaoo!...more