Defending MotoGP world champion Jorge Lorenzo was at a loss to explain braking trouble he encountered during free practice at Aragon today.

Lorenzo had led the way in FP1 with a lap in 1m 49.753s but dropped to fourth place in FP2, 0.418s behind Repsol Honda's Marc Marquez.

The Factory Yamaha rider, who has won the last two races at Silverstone and Misano, was left perplexed as the front end of his M1 kept tucking under braking.

Related Articles

"I was expecting to be competitive from the beginning here, because I made a lap record in the [June] test, a 1m 48.0s, four tenths faster than the record," he said.

"But today we had much more problems. Especially under braking. The front was 'closing' [folding]. We don't know exactly what is happening.

"Anyway we have to believe, we have to think that we are going to improve the bike for tomorrow and that we can be much faster.

"We hoped to improve the bike from the morning but we couldn't do it. I have a worse feeling than when we were here for the test," he added.

"The other riders are improving their pace a lot but we are optimistic. We can improve the bike and make another step. We need to be competitive whether it is hot or not."

Lorenzo's fastest lap today was 1m 49.405s, which left him 0.151s behind Dani Pedrosa in third place.

He is joint second in the championship table with Pedrosa, 34 points behind Marquez with five rounds including the Aragon MotoGP remaining.

"[Lorenzo] has complained that the grip drops really quickly," said team manager Wilco Zeelenberg. "We need to try and improve tyre life; that is high on his wish list. The lap times are quite close but we can do better."