Marlboro Ducati's Valentino Rossi will once again alter the way he sits on the Desmosedici GP11.1 in an effort to find a solution to the front-end grip problem which the new aluminium chassis did not sort out at the Aragon MotoGP round.

The Doctor admitted the new, FTR-built frame had fixed nothing while team-mate Nicky Hayden, who didn't get to use the unit, says the team has gone backwards in development after he was 25 second slower over race distance than last year.

"For me, we have a great enemy and that is time. For this reason we try to fix the problem in the shorter time but maybe this is not the right way to work. It is difficult for sure because maybe we need something that needs more time to do," said Rossi, speaking to bikesportnews.com

"We are losing in some areas which is strange. I mean compared to Stoner we are a lot less slower in the straight with the same bike so we need to understand because maybe this riding position is more suitable for the shorter and small rider than for the taller like me or also like Nicky so we have to think about this point and modify something.

"I don't feel very comfortable on the bike. We already think of something to move the weight, move me, on the bike and if you look at me on the television, I don't ride like in the past, I don't have the same position on the bike. It's quite clear from all sides. So we work in some different way and hope we find the right way for improve."