Cal Crutchlow had finished the first day of the MotoGP test at Buriram on top of the timesheets, the LCR Honda rider making a charge in the afternoon to set a quickest time of 1'30.797. Suzuki's Alex Rins got close to Crutchlow's time, but fell just a hundredth or so shy of the Englishman to take second. But he did get ahead of Repsol Honda's Marc Marquez, who had been fastest for most of the day.
Andrea Dovizioso ended up in fourth, the factory Ducati rider also not improving the time he set in the morning, finishing just ahead of the second Repsol Honda rider, Dani Pedrosa. The Pramac Ducati squad took sixth and seventh, Danilo Petrucci on the GP18 finishing just ahead of Jack Miller on the GP17. Valentino Rossi was the first of the Yamahas in eighth, four tenths behind Crutchlow and just ahead of Andrea Iannone on the second Suzuki. Jorge Lorenzo rounded out the top ten on the second factory Ducati, though he too was just 0.449 slower than fastest man Crutchlow.
As predicted by Johann Zarco on Thursday, the entire grid is very close indeed. 0.449 separates the top ten, while theere are twenty riders within a second of Crutchlow, Bradley Smith being the last of them on a KTM.
The day saw a fair few technical novelties debuted. Suzuki tried a new exhaust for the GSX-RR, though that may have been tested in Sepang as well. But the big news was Ducati's new aerodynamics package, or rather packages. The Italian factory tried out two new aero fairings: one, with a revised design of the top half of last year's fairing, looking more like the Yamaha aero package which appeared in Sepang. The other stuck much more closely to last year's design, but had a much longer lower section and various openings on the top and sides of the panels. The aerodynamics cat is very much out of the bag, and there's no getting it back in again.
For reference, the WorldSBK lap records for the Buriram circuit are both held by Jonathan Rea and set in 2017. The pole record is 1'32.957, and the race lap record is 1'33.436. The MotoGP bikes are lapping 2 seconds a lap faster after the first day.
|1||35||Cal Crutchlow||Honda RC213V||1:30.797|
|2||42||Alex Rins||Suzuki GSX-RR||1:30.809||0.012||0.012|
|3||93||Marc Marquez||Honda RC213V||1:30.912||0.115||0.103|
|4||4||Andrea Dovizioso||Ducati GP18||1:30.945||0.148||0.033|
|5||26||Dani Pedrosa||Honda RC213V||1:30.960||0.163||0.015|
|6||9||Danilo Petrucci||Ducati GP18||1:31.003||0.206||0.043|
|7||43||Jack Miller||Ducati GP17||1:31.044||0.247||0.041|
|8||46||Valentino Rossi||Yamaha M1||1:31.189||0.392||0.145|
|9||29||Andrea Iannone||Suzuki GSX-RR||1:31.235||0.438||0.046|
|10||99||Jorge Lorenzo||Ducati GP18||1:31.246||0.449||0.011|
|11||25||Maverick Viñales||Yamaha M1||1:31.294||0.497||0.048|
|12||5||Johann Zarco||Yamaha M1||1:31.305||0.508||0.011|
|13||53||Tito Rabat||Ducati GP17||1:31.523||0.726||0.218|
|14||19||Alvaro Bautista||Ducati GP17||1:31.525||0.728||0.002|
|15||41||Aleix Espargaro||Aprilia RS-GP||1:31.662||0.865||0.137|
|16||45||Scott Redding||Aprilia RS-GP||1:31.685||0.888||0.023|
|17||30||Takaaki Nakagami||Honda RC213V||1:31.692||0.895||0.007|
|18||17||Karel Abraham||Ducati GP16||1:31.698||0.901||0.006|
|19||21||Franco Morbidelli||Honda RC213V||1:31.729||0.932||0.031|
|20||38||Bradley Smith||KTM RC16||1:31.741||0.944||0.012|
|21||12||Tom Luthi||Honda RC213V||1:32.716||1.919||0.975|
|22||10||Xavier Simeon||Ducati GP16||1:32.720||1.923||0.004|
|23||36||Mika Kallio||KTM RC16||1:32.749||1.952||0.029|
|24||55||Hafizh Syahrin||Yamaha M1||1:33.165||2.368||0.416|