MotoGP title leader Jorge Lorenzo will test an early version of next year's Yamaha M1 during Monday's official post-race test at Brno.

"Tomorrow Jorge will test the first 2013 prototype 1000cc M1 and Ben [Spies] will be testing 2012 M1 set up solutions," said team director Massimo Meregalli.

Lorenzo's championship lead has been cut to 13-points, with six rounds to go, after he lost out to Honda's Dani Pedrosa in a thrilling last-turn showdown in Sunday's Czech Republic Grand Prix.

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Pedrosa has been racing an early version of the 2013 Honda since July's Laguna Seca round, however the MotoGP engine change restrictions complicate such a move.

Spies is not testing the 2013 bike since he is leaving the Factory Yamaha team at the end of this season. The Texan will be replaced by Valentino Rossi.