Nine-time world champion Valentino Rossi on Tuesday heaped praise on his Yamaha bike after finishing fourth on the first day of pre-season MotoGP testing at Malaysia's Sepang circuit on Tuesday. The Italian won four of his world championships with Yamaha before leaving for Ducati at the end of 2010, but has not won in the last 37 races. After briefly topping the fastest times, Rossi eventually clocked in just 0.427 seconds behind leader Dani Pedrosa (2:01.157) and enough to convince the great that his reunion with Yamaha can see him back to winning ways.