A damp track caused by overnight rain meant that although the track opened at 10am, all bikes remained in the pits until 11:15am.
World champion Casey Stoner is not testing today after aggravating an old back injury. The Australian is now resting and aims to return tomorrow. The four laps credited as Stoner's were by test rider Kousuke Akiyoshi.
Note that some of the times listed for Ducati riders were actually shakedown laps, on their bikes, completed by factory test rider Franco Battaini.
However, Valentino Rossi has made his debut on the all-new (and all-black) Desmosedici GP12, with which he moved to the top of the timesheets at 1pm.
All twelve manufacturer riders are present for the three-day test, plus the Forward Racing and BQR 'Claiming Rule Team' teams.
1. Valentino Rossi
ITA Ducati Team 2m 2.905s
2. Ben Spies
USA Yamaha Factory Racing 2m 2.930s
3. Jorge Lorenzo
ESP Yamaha Factory Racing 2m 3.044s
4. Alvaro Bautista
ESP San Carlo Honda Gresini 2m 4.110s
5. Katsuyuki Nakasuga
JPN Yamaha Test Rider 2m 4.577s
6. Dani Pedrosa
ESP Repsol Honda 2m 4.971s
7. Casey Stoner
AUS Repsol Honda 2m 7.163s
8. Andrea Dovizioso
ITA Monster Yamaha Tech 3 2m 8.375s
9. Cal Crutchlow
GBR Monster Yamaha Tech 3 2m 10.993s
10. Ivan Silva
ESP BQR (FTR-Kawasaki CRT) 2m 11.280s
11. Nicky Hayden
USA Ducati Team 2m 11.759s
12. Stefan Bradl
GER LCR Honda 2m 11.887s
13. Karel Abraham
CZE Cardion AB Motoracing 2m 15.563s
14. Jordi Torres
ESP BQR (FTR-Kawasaki CRT) 2m 16.565s
15. Hector Barbera
ESP Pramac Racing 2m 17.372s
Official Sepang MotoGP lap records:
ITA Yamaha 2m 0.518s
Fastest race lap:
AUS Ducati 2m 2.108s
Fastest 2011 Sepang test time:
AUS Honda 1m 59.665s