Jorge Lorenzo continued to hold sway at the top during the second MotoGP free practice session at Motorland Aragon, increasing his advantage at the head of the times to assert his authority in Spain.
The Movistar Yamaha rider lapped in 1m 47.517s to end the opening day in control, a huge 0.683 seconds ahead of team-mate and MotoGP World Championship leader Valentino Rossi, who enjoyed a short-lived spell at the helm of FP2 until Lorenzo also switched to the medium rear and blitzed the Italian's time by almost seven tenths.
Britain's Bradley Smith, riding high after his stunning runner-up finish at Misano, completed an all-Yamaha top three on the Monster Tech 3 M1 with a lap in 1m 48.318s, which left him eight tenths behind Lorenzo, who was 0.490s faster than nearest challenger Marc Marquez in FP1.
The factory Yamaha pair clocked their best times after fitting new medium rear tyres in the final 10 minutes of FP2, while Repsol Honda riders Marquez and Dani Pedrosa remained on the hard compound.
Pedrosa – who was three tenths clear of Lorenzo with 30 minutes of the afternoon stint remaining – finished as the leading Honda, only 0.040s behind Smith, with Marquez slotting into fifth with a lap in 1m 48.401s, leaving him with more than eight tenths to find on Lorenzo.
Pol Espargaro completed the top six on the second of the Monster Yamaha Tech 3 machines ahead of brother Aleix Espargaro on the Ecstar Suzuki, who was a second off the top spot on the GSX-RR and had briefly lead FP2 in the early stages.
A quartet of Ducati riders filled the top 11 with Andrea Dovizioso and the injured Andrea Iannone on the factory GP15s eighth and ninth respectively, over a second down on the afternoon benchmark.
Danilo Petrucci on the Octo Pramac Ducati was tenth followed by team-mate Yonny Hernandez as the duo finished FP2 1.312s and 1.438s off the pace of Lorenzo's Yamaha.
Scott Redding, who celebrated his maiden premier class rostrum at Misano, finished ahead of fellow Briton Cal Crutchlow in 12th on the Estrella Galicia 0,0 Marc VDS Honda, lapping in 1m 49.007s with Crutchlow 0.057s behind on the LCR Honda.
Avintia Racing's Hector Barbera was the leading Open class rider on the GP14 in 14th ahead of Aprilia's Alvaro Bautista and series rookie Maverick Vinales on the second factory Suzuki.
Frenchman Loris Baz was 17th quickest on the Forward Yamaha, while Ireland's Eugene Laverty – at one stage the leading Open rider in FP2 – completed the session in 18th position on the Aspar Honda, 2.252 seconds from the top spot.
His team-mate, Nicky Hayden – riding with a thumb injury – was 22nd fastest ahead of Aussie Jack Miller on the LCR Honda RC213V-RS.
Toni Elias – Claudio Corti's replacement at Forward Racing – was 24th.
1. Jorge Lorenzo
2. Valentino Rossi
3. Bradley Smith
4. Dani Pedrosa
5. Marc Marquez
6. Pol Espargaro
7. Aleix Espargaro
8. Andrea Dovizioso
9. Andrea Iannone
10. Danilo Petrucci
11. Yonny Hernandez
12. Scott Redding
13. Cal Crutchlow
14. Hector Barbera
15. Alvaro Bautista
16. Maverick Viñales
17. Loris Baz
18. Eugene Laverty
19. Stefan Bradl
20. Mike Di Meglio
21. Jack Miller
22. Nicky Hayden
23. Alex De Angelis
24. Toni Elias
25. Karel Abraham