Marquez quickest in Austin after late flyer

Reigning MotoGP world champion Marc Marquez returned to the top the timesheets for Repsol Honda in Friday's second practice session at the Americas MotoGP.

Yamaha's Maverick Vinales dominated FP1 earlier in the day and he looked set for more of the same in the afternoon.

The Spaniard led the way after pipping early pace setter Marquez midway through the second session, but with time running out, Marquez and French rookie Johann Zarco both produced flying laps to relegate Vinales to third.

The reason for that was the riders all fitting soft front and rear tyres toward the end of the session, which led to improved times. 

Vinales did not make the change, so he will be more than happy with being fastest before the new rubber came on.

Marquez final lap of 2m04.061s was 0.286s ahead of Zarco, who continued to impress for Yamaha Tech 3, and 0.390s ahead of Vinales.

Rossi also produced a late burst on the soft tyres to lift himself up to fourth overall, a little over a tenth ahead of Dani Pedrosa.

Andrea Dovizioso was sixth as the fastest Ducati, while Cal Crutchlow led the Hondas in seventh.

Zarco's team-mate Jonas Folger was eighth, followed by Scott Redding and Andrea Iannone, who rounded out the top 10.

FP2 Times

1 Marc Marquez Honda 2m04.061s
2 Johann Zarco Tech3 Yamaha 2m04.347s +0.286s
3 Maverick Vinales Yamaha 2m04.451s +0.390s
4 Valentino Rossi Yamaha 2m04.806s +0.745s
5 Dani Pedrosa Honda 2m04.811s +0.750s
6 Andrea Dovizioso Ducati 2m04.830s +0.769s
7 Cal Crutchlow LCR Honda 2m05.005s +0.944s
8 Jonas Folger Tech3 Yamaha 2m05.033s +0.972s
9 Scott Redding Pramac Ducati 2m05.116s +1.055s
10 Andrea Iannone Suzuki 2m05.142s +1.081s
11 Jorge Lorenzo Ducati 2m05.282s +1.221s
12 Danilo Petrucci Pramac Ducati 2m05.284s +1.223s
13 Jack Miller MVDS Honda 2m05.463s +1.402s
14 Aleix Espargaro Aprilia 2m05.468s +1.407s
15 Hector Barbera Avintia Ducati 2m05.584s +1.523s
16 Alvaro Bautista Aspar Ducati 2m05.602s +1.541s
17 Tito Rabat MVDS Honda 2m05.943s +1.882s
18 Alex Rins Suzuki 2m06.155s +2.094s
19 Loris Baz Avintia Ducati 2m06.358s +2.297s
20 Pol Espargaro KTM 2m06.503s +2.442s
21 Karel Abraham Aspar Ducati 2m06.709s +2.648s
22 Sam Lowes Aprilia 2m06.741s +2.680s
23 Bradley Smith KTM 2m07.434s +3.373s