UPDATE 1-Motorcycling-Rossi breaks drought in wet Shanghai

Honda's Pedrosa, the only rider to mount the podium in all four races this year, was happy with second place.

"In the end I just slowed down because I saw that I couldn't get Valentino, and I just decided to keep the engine alive and finish second," the 22-year-old said.

Lorenzo, who qualified fourth on his Yamaha despite suffering a fractured left ankle after being thrown off his bike in practice on Friday, finished fourth after a late surge on the day of his 21st birthday.

America's Colin Edwards, however, was disappointed to finish seventh after smashing Rossi's pole position record on Saturday.

Italy's Andrea Iannone on an Aprilia won the 125cc race with a time of 46 minutes 2.275 seconds, more than three seconds faster that France's Mike Di Meglio on 46 minutes 5.630 seconds.

Finland's Mikko Kallio riding a KTM won the 250cc category in 48 minutes 12.217 seconds ahead of Japan's Hiroshi Aoyama. (Writing by Ian Ransom; Editing by Ed Osmond)