Jorge Lorenzo vows to work with Valentino Rossi at Yamaha Yamaha Moto GP rider Jorge Lorenzo (left) of Spain powers his bike next to Aspar rider Randy De Puniet at Sepang. JORGE Lorenzo has vowed to work with his former rival, nine-time world champion Valentino Rossi, who has rejoined the Yamaha MotoGP team. The pair had a bitter relationship when Lorenzo joined Yamaha in 2008. Rossi, who won four world championships with Yamaha, left to join the Italian team Ducati in 2010 but endured two frustrating seasons. It is better to work together than to go separately. We are in the same team," Lorenzo told reporters at the sidelines of the pre-season MotoGP testing at Malaysia's Sepang circuit. "Yes, probably something has changed," when asked if this time around the relationship will be different. I hope so. I think he hopes so. You can share information. You can speak about the new improvements (that is needed). We must pass some notes. Together is better," added the reigning champion who also won in 2010. Lorenzo is eyeing another successful MotoGP season but he expects a tough challenge from Honda's Dani Pedrosa and Rossi. Rossi finished just twice on the podium for Ducati. The Italian's 2011 campaign went without winning a single race, the first time that happened in his grand prix career. It was the Honda and Yamaha teams that continued to top the timesheet although the gap to the rest of the field was narrowing on Wednesday. Meanwhile Pedrosa fought hard to set the quickest lap yesterday, the second day in pre-season testing at Sepang circuit which saw rainfall towards the end of the session. Pedrosa was first on the timesheet with a fastest lap of 2 minutes 00.549 seconds, while reigning Lorenzo was 0.019 seconds slower, and Honda's star rookie Marc Marquez was 0.254 seconds off the pace. Rossi again ended the day fourth, 0.489 seconds behind Pedrosa. It was the Honda and Yamaha foursome that continued to top the timesheet although the gap to the rest of the field is narrowing. Pedrosa continued to test parts for engine durability, while Lorenzo was close on his tail with his new chassis and engine upgrades. Spain's Marquez continued to impress as is Rossi, who is also putting in consistent times as he gets reacquainted with his Yamaha machine after a two-year absence. Pedrosa, a three-time championship runner-up who is still looking for his first world crown, told reporters at the end of the day that he concentrated on the weight balance settings on his bike. Yes, lap time is OK. (But) the bike is not ready for maximum push. It is not done yet but we are on it. I did one lap in the afternoon and the rain came," he said. Meanwhile a smiling Marquez who managed to stay ahead of Rossi for two straight days said that he was happy to set constant lap times. Today I tried to understand the electronics control on the bike. The Honda team tried to help me. Sure it is a surprise to be in front of Rossi," he said. But we are in the pre-season testing. The position is not important. This is only the first test. Lorenzo, who is in the hunt for another successful MotoGP year, was worried about his acceleration out of corners. "Well I am happy today," he said but "we still could not solve the problem with the acceleration." Lorenzo, however, said the strong point of the Yamaha was its powerful braking, resulting in the bike being competitive with his rival Pedrosa. The first test session ends today. The opening round of the MotoGP world championship will be in Qatar under floodlights on April 7. Malaysia will host round 15 on October 13