Repsol Honda's Marc Marquez says it is clear Jorge Lorenzo will be a tough nut to crack this weekend at Misano.

Lorenzo shattered the lap record in FP2 to end Friday on top with a time of 1m 32.871s on the Movistar Yamaha to edge out reigning champion Marquez by 0.053 seconds.

The San Marino MotoGP has been largely dominated by Yamaha in recent seasons but along with Lorenzo and Valentino Rossi, Marquez has also highlighted his team-mate Dani Pedrosa as a strong contender this weekend.

"It looks like Jorge will be the stronger one this weekend because his pace is very good, but also we cannot forget Dani - his pace was good," said Marquez.

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"Honestly, we didn't make a really good practice; we changed many things and also the tyres and we couldn't find the best set-up because from the test until now the track changed quite a lot and it is slippier and has some more bumps, so it looks like we must adjust the set-up to the track."

Marquez tested a new Honda swingarm in both sessions but has ruled out using the upgrade again this weekend.

"It is a completely new swingarm from Honda and they tried to make a really big change for next year's bike and for the future," he said.

"I tried it in FP1 and again in FP2 but we will not try again this weekend because we had some small, positive points that are really interesting but also it has too many negatives.

"In the test we changed the geometry of the bike but for some reason here today it didn't work well and maybe tomorrow we will come back to our usual geometry. We are trying to work hard on the front also."

The Misano circuit carries the name of Italian racer Marco Simoncelli, who was tragically killed following an accident at Sepang in Malaysia in 2011 and was also the scene of a fatal incident involving Shoya Tomizawa in 2010.

Asked how deals with the fear of a serious or fatal accident, Marquez said he simply refuses to dwell on the possibility of a life-threatening spill.

"You cannot think about this because if you have in your head you will be slow. We know that always out on the track we take a risk but we didn't realise well until something happens, like Shoya Tomizawa and Marco, but in the end it is a risk we take," he said.

"One thing that is good is the safety is always getting better and that is important to the riders because it gives to us a really good confidence."

Prior to the San Marino MotoGP, Marquez travelled to Austria to see the new championship Red Bull Ring venue, which will be added to the calendar in 2016.

"I went to Austria and it was interesting; from the map it looks like and easy track but when you are there it is uphill, downhill and it was interesting, but I think it will be a nice circuit," Marquez said.