Repsol has extended its title sponsorship of the factory Honda MotoGP team until at least the end of 2017.

The Spanish petroleum company has backed the official HRC squad since 1995, making it the longest running sponsor-factory agreement of its kind in the the motorcycle World Championship.

"There is no better moment to celebrate this renewal, after a fantastic 1-2 finish in Germany and now we're 1-2 in the Championship," said HRC vice president Shuhei Nakamoto.

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"We are very happy to extend our partnership with Repsol, which is not only a sponsorship agreement but key technical relationship. With the new 20 litre fuel rules in 2014, we have worked closely with Repsol and we are proud to share our successes both now and in the future!"

Reigning world champion Marc Marquez - undefeated after the opening nine rounds of this season - and Spanish team-mate Dani Pedrosa are contracted to Repsol Honda until at least the end of 2016.

Half of the 500cc/MotoGP World Championship titles won in the past 20 years have gone to Repsol Honda thanks to Mick Doohan (1995-1998), Alex Criville (1999), Valentino Rossi (2002-2003), Nicky Hayden (2006), Casey Stoner (2011) and Marquez (2013).

Repsol Honda has also won 133 races since 1995, including 35 for Doohan and 25 for Pedrosa.