Repsol Honda's Marc Marquez devoted a large chunk of free practice on Friday to working through Michelin's tyre options at Misano.

The MotoGP World Championship leader felt he made an error by fitting the softer front tyre at Silverstone last weekend in contrast to his chief rivals, who opted for the harder compound.

Marquez slid off at turn 10 in FP1 but the 23-year-old finished fourth fastest in the morning before ending the day fifth overall after lapping the Marco Simoncelli Circuit in 1m 33.196s in FP2, which left him four tenths adrift of surprise pacesetter Pol Espargaro.

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"Since I went off in the first lap I felt something different with the front and the main difference was the front tyre. I didn't know what was the real limit, so I crashed. I tried to save with my elbow but it was not possible," Marquez said.

"Today we tested all the tyres, all the possibilities, because we don't want to repeat the same mistake as Silverstone. With the front options, it looks like the hard is a little bit more stable, but less feedback. Then with the medium one, more feedback, but more movement so I need to decide about these two tyres. It looks like the soft can be an option for the rear.

"I'm happy with how the day went overall. I think we worked pretty well," he added. "Honestly we've suffered less than we had initially expected; in fact, I was able to be among the fastest riders and I think that if we continue to work well we can have a good weekend."

Marquez holds a lead of 50 points over Movistar Yamaha's Valentino Rossi, who closed the gap slightly by three points at Silverstone, taking advantage of a mistake by Marquez in the final stages of the race to claim the final spot on the rostrum.