Friday put forth evidence to suggest HRC and Marc Marquez are working through the issues that have afflicted their recent MotoGP form.

Fastest in the morning and second in the afternoon, the Spaniard ended the first MotoGP day in Barcelona close to 0.6s faster than man-of-the-moment Jorge Lorenzo.

Marquez's times were impressive. His morning best, set on the medium compound rear, was three tenths of a second faster than the official circuit record. His FP2 time was four tenths faster again and only bettered by Aleix Espargaro's Suzuki, benefiting from the softer Bridgestone rubber.

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Testing a new exhaust from HRC, Marquez believes the new parts are aiding him on corner entry but maintaining his pace over race distance remains a concern.

"The new exhaust looks slightly better," said the 22-year old, 49 points behind Valentino Rossi in the championship standings. "On the entry I can control better. We still need to work but I am happier because we are closer. Especially with the new tyres we feel really good. Now we need to work on the second part of the race. We are in the situation that we can start to play with the set up. That will be the key of the weekend.

"What I feel more is the corner entry, not the exit. In the exit we already managed more or less in Mugello by electronics. Here we are looking more at corner entry. We are looking slightly better but still we need to manage when the grip drops but it seems more constant."

Marquez went on to specify the changes have left the front end of his RC213V feeling more like the 2014 version. Although there is still a lot of rear movement, he feels it is more under control than before.

Work on electronics that he carried out at Mugello have also gone some way to improving his feeling on corner exit.

"It looks like it's more in the way of last year. This year it's smoking the rear a lot. There are very long slides. Still this problem is there and there are still slides but I can control better.

"On one lap we are really strong and on the new tyres I feel really strong. Obviously this afternoon in the first exit the same. Then in the second we try a different thing. We saw that wasn't the way and we came back. Then in the final exit we put again a new tyre. We must wait but we need to work hard in the second part of the race. In the first part we are there. Now we must work on the second."

Team-mate Dani Pedrosa did not try the new exhaust today, but may use it on Saturday.

"I was trying today two different swingarms. It's not clear yet which one I will use, the analysis is still going on in the box. I hope tomorrow to have a clear choice, also for the tyre. And then try some other things for the setting," the Spaniard added.