Jonathan Rea lapped just half a second adrift of Tom Sykes on his first day aboard the Kawasaki ZX-10R as he completed his first laps with the manufacturer at Motorland Aragon.

In a career spent almost exclusively as a Honda rider, Rea - who has raced the CBR1000RR in WSBK since 2008 - got his first chance to try alternative machinery in Spain as he prepares for the 2015 World Superbike Championship season as a Kawasaki rider.

Quickly getting up to speed, Rea completed the day just half a second shy of former title-winning team-mate Sykes, completing the day with a 1min 52.7secs lap around the MotoGP configuration layout.

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The fastest laps of the day, however, were posted by Ducati riders Chaz Davies and Davide Giugliano, the pair lapping in identical 1min 51.3secs laps.

Testing continues today.