MotoGP title leaders Valentino Rossi and Jorge Lorenzo will be showing extra caution during Monday's Michelin tyre test at Brno.

The post-race outing will be the last time riders try the 2016 tyres before the season concludes at Valencia.

But the difficulty of suddenly switching to the French rubber after three days adapting their riding style and machines to the present Bridgestone tyres was highlighted by front-end accidents for Rossi, Lorenzo and reigning champion Marc Marquez at Mugello earlier this year.

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"It is important to try the Michelin tyres on Monday because the next test will not be until after Valencia," Rossi said. "But it is also strange for us now to think about 2016 in the crucial moment of 2015. You have to keep attention at this moment with the Michelin so I hope everybody will go slowly."

Lorenzo, who has fallen heavily during both his previous Michelin tests at Sepang and then Mugello, added:

"Well looking how the last two tests finished, we are not so excited! But anyway it is very important to try to understand how the tyres react, how we can make the best indications to the engineers for them to improve for next year. But for sure, as Vale says, we have to be more than careful."

Rossi is nine points ahead of Lorenzo heading in to this weekend's race.

Unlike the Yamaha riders, Marquez and Repsol Honda team-mate Dani Pedrosa last rode with the Michelins during a private test at Misano during the summer break.