Rossi stays on top on second test day

The first half of the session was interrupted by rain, with conditions not completely dry until lunchtime. But once the track was up to speed, Rossi lapped in 2m00.925s for Yamaha, beating nearest rival Casey Stoner (Ducati) by 0.4 seconds.

"We worked on the new bike to find a better setting and I was happy to be the fastest overall - even though this is just testing this is important for me," Rossi said.

"At the next test we will have a few more new things but we're already happy because we're fast and strong.

"There is room to improve of course; Sepang is always a good track for the Yamaha so we will have to wait until Qatar to get a better understanding of our level, but we have made a great start."

After a low-key Thursday, Rossi's team-mate Jorge Lorenzo moved up to third today.

"I felt much better today and I was able to be fast straight away," said Lorenzo.

"It wasn't a big problem yesterday, it's just that after such a long break I forget how to ride a little bit! I need a bit of time, but it was much better today."

Yamaha filled four of the top seven places, with Tech 3 riders Ben Spies and Colin Edwards taking fifth and seventh. Factory Honda duo Dani Pedrosa and Andrea Dovizioso were fourth and sixth.

Nicky Hayden took eighth on the second works Ducati, while Aleix Espargaro was an impressive ninth for the satellite Pramac team.

Following a strong performance yesterday, Loris Capirossi (Suzuki) slipped back to 10th today.

The day's only accident was a high-side for Gresini Honda's rookie Marco Simoncelli halfway through the session. The Italian was unhurt and continued running later in the afternoon.

The MotoGP field returns to Sepang in two weeks' time for the second test of this year's reduced pre-season schedule.

Pos  Rider             Bike               Time       Gap
 1.  Valentino Rossi   Yamaha             2m00.925s
 2.  Casey Stoner      Ducati             2m01.320s  + 0.395s
 3.  Jorge Lorenzo     Yamaha             2m01.680s  + 0.755s
 4.  Dani Pedrosa      Honda              2m01.822s  + 0.897s
 5.  Ben Spies         Yamaha             2m02.266s  + 1.341s
 6.  Andrea Dovizioso  Honda              2m02.272s  + 1.347s
 7.  Colin Edwards     Yamaha             2m02.479s  + 1.554s
 8.  Nicky Hayden      Ducati             2m02.493s  + 1.568s
 9.  Aleix Espargaro   Pramac Ducati      2m02.647s  + 1.722s
10.  Loris Capirossi   Suzuki             2m02.763s  + 1.838s
11.  Marco Melandri    Gresini Honda      2m02.810s  + 1.885s
12.  Hector Barbera    Aspar Ducati       2m03.032s  + 2.107s
13.  Randy de Puniet   LCR Honda          2m03.043s  + 2.118s
14.  Hiroshi Aoyama    Interwetten Honda  2m03.195s  + 2.270s
15.  Marco Simoncelli  Gresini Honda      2m03.245s  + 2.320s
16.  Alvaro Bautista   Suzuki             2m03.274s  + 2.349s
17.  Mika Kallio       Pramac Ducati      2m03.359s  + 2.434s