Jorge Lorenzo declined to speak to the media after experiencing more misery with the new 2014 rear tyres during day two of this week's second Sepang MotoGP test.

Like Factory Yamaha team-mate Valentino Rossi, Lorenzo had made his frustration at the decision to change to the stiffer 2014 specification clear after battling for grip on day one.

The Spaniard then slipped down the order to ninth fastest on day two, when he was left over one-second behind Repsol Honda's Dani Pedrosa.

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While Lorenzo kept his Thursday thoughts to himself, team manager Wilco Zeelenberg explained the situation to Crash.net:

"Both tyres [hard and soft] don't work for us. Both are the same. Slow. Normally you improve with the soft one, but we do the same time with both. Edge grip is the main problem.

"You never stop trying and there is always something new to try, but we are very curious to see how it is at Phillip Island [the next test]. If we are competitive again then we know the tyres are not working for us at this track."

Lorenzo was only the fourth fastest Yamaha rider behind Aleix Espargaro, Rossi and Pol Espargaro.

"Jorge is struggling a bit more than the others because he has a different riding style. He really likes to lean the bike and use the edge to keep the corner speeds. So it has hurt one of his special skills.

"It has never been so extreme before. He has always been able to do something decent with the same tyres as everyone was using. Okay sometimes you have a small advantage, sometimes a small negative. But now...

"Already at the last test he had this feeling, 'I cannot do anything with this tyre, only the old [2013] one is working well'. Also the lap time was a lot better at the last test.

"The track is dirtier this week but to do one or two fast laps should be possible for everybody."

The Sepang test concludes on Friday.

Update: Yamaha sent the following quote attributed to Lorenzo in their end-of-day press release:

"Today I am very disappointed, especially in the tyre behaviour. Nothing has changed compared to yesterday. I still don't have the confidence to ride as I want to. Tomorrow is another day, we still have eight hours to find the right way so we will work hard and hopefully by the end of tomorrow we will have solutions."