Marquez sebetulnya menjadi yang tercepat dalam sesi Q2. Namun karena menerima hukuman, ia start dari posisi keempat dalam balapan yang berlangsung Senin (23/4/2018) dini hari WIB.
Vinales yang sebetulnya mencatatkan waktu lebih lambat 0,406 detik dari Marquez di Q2 start dari pole position. Posisi start kedua ditempati pebalap tim Suzuki Ecstar Andrea Iannone dan posisi start ketiga ditempati pebalap tim Monster Yamaha Tech 3 Johann Zarco.
Rekan setim Vinales, Valentino Rossi, start dari posisi kelima. The Doctor diikuti pebalap Ducati Jorge Lorenzo yang start dari posisi keenam.
Hasil kualifikasi MotoGP Amerika 2018:
Qualifying 2:
Marc Marquez ESP Repsol Honda (RC213V) 2m 3.658s [Lap 4/5] 334km/h (Top Speed)
Maverick Viñales ESP Movistar Yamaha (YZR-M1) 2m 4.064s +0.406s [Lap 6/7] 334k
Andrea Iannone ITA Suzuki Ecstar (GSX-RR) 2m 4.209s +0.551s [Lap 6/7] 328k
Johann Zarco FRA Monster Yamaha Tech3 (YZR-M1) 2m 4.210s +0.552s [Lap 6/7] 332k
Valentino Rossi ITA Movistar Yamaha (YZR-M1) 2m 4.229s +0.571s [Lap 5/6] 337k
Jorge Lorenzo ESP Ducati Team (GP18) 2m 4.294s +0.636s [Lap 5/6] 338k
Cal Crutchlow GBR LCR Honda (RC213V) 2m 4.456s +0.798s [Lap 6/7] 340k
Andrea Dovizioso ITA Ducati Team (GP18) 2m 4.865s +1.207s [Lap 6/7] 337k
Dani Pedrosa ESP Repsol Honda (RC213V) 2m 4.963s +1.305s [Lap 3/7] 335k
Danilo Petrucci ITA Pramac Ducati (GP18) 2m 5.058s +1.400s [Lap 6/7] 337k
Alex Rins ESP Suzuki Ecstar (GSX-RR) 2m 5.260s +1.602s [Lap 2/7] 330k
Pol Espargaro ESP Red Bull KTM Factory (RC16) 2m 5.829s +2.171s [Lap 2/6] 335k
Qualifying 1:
Takaaki Nakagami JPN LCR Honda (RC213V)* 2m 05.457s 328k
Tito Rabat ESP Reale Avintia (GP17) 2m 05.686s 334k
Bradley Smith GBR Red Bull KTM Factory (RC16) 2m 05.761s 334k
Hafizh Syahrin MAL Monster Yamaha Tech3 (YZR-M1)* 2m 05.873s 333k
Franco Morbidelli ITA EG 0,0 Marc VDS (RC213V)* 2m 05.943s 327k
Jack Miller AUS Pramac Ducati (GP17) 2m 05.966s 332k
Aleix Espargaro ESP Factory Aprilia Gresini (RS-GP) 2m 06.035s 327k
Thomas Luthi SWI EG 0,0 Marc VDS (RC213V)* 2m 06.222s 330k
Alvaro Bautista ESP Angel Nieto Team (GP17) 2m 06.296s 335k
Scott Redding GBR Factory Aprilia Gresini (RS-GP) 2m 06.370s 326k
Karel Abraham CZE Angel Nieto Team (GP16) 2m 06.537s 332k
Xavier Simeon ESP Reale Avintia (GP16)* 2m 06.726s 331k
* Rookie