Valentino Rossi bettered his time from FP1 by more than one-and-a-half seconds in the afternoon but the MotoGP World Championship leader admitted it 'wasn't enough' after struggling to get the best from the Movistar Yamaha at Misano.

Rossi's time of 1m 43.469s left him fifth fastest on Friday, almost six tenths of a second behind team-mate and title rival Jorge Lorenzo in San Marino.

"During the practice we were able to make a step forward, which is good, but it's not enough because I still don't feel a 100 per cent and can't ride at the maximum, so we have to improve for tomorrow," Rossi said.

Related Articles

"During the summer Honda, Ducati and Suzuki all test and they all agree the track has more grip but for some reason today the feeling is not fantastic.

"I think everybody is not at the limit with the front, with the braking on entry. The bike was a bit difficult to control but this morning was worse.

"Already this afternoon I did a good step. I modify the setting and I was able to improve the pace. The feeling during all the practice improved and at the end I was able to do a good rhythm," he added.

"But I don't feel comfortable at 100 percent and we have to work to try to improve. I'm still not fast enough in braking and the entry."

Rossi conceded that Lorenzo has the better pace after day one and revealed that he may also use the winglets on his M1 this weekend.

"We have to continue to work because Jorge and Marc are very fast. Also Pedrosa has a good pace. We have to work to try and improve for tomorrow," Rossi said.

"Jorge was very fast from the beginning. He is able to ride well. He start with the hard [rear tyre] and he put the soft [medium] at the end, so for sure this is good. But anyway I think he is the man with the better pace.

"It's possible that I will give the winglets a try this weekend. We already rode with them during the private test [at Aragon] and the first feeling wasn't so bad," he added.

"It is a small help but a small help can make a small difference."

The nine-times world champion tried the hard front and rear option in FP2 and feels it could prove to be the best choice for Sunday's race.

"Also we tried the hard front and rear at the end and it can be a good option for the race. I like both," he said.

"Now it's too early to say. Tomorrow we'll try both hard in the front and rear and will try to understand to work the right choice."

Rossi's victory in the wet at Silverstone saw him increase his advantage in the championship standings to 12 points over Lorenzo with six rounds remaining.