Vinales overhauled Rins – who’d dethroned long-time leader Andrea Dovizioso (Ducati) that a few minutes earlier – seconds before the chequered flag fell.
But while Vinales had left it late to grab the best spot, having trailed Rins through the initial two sectors, his margin on the Suzuki man in the ending proved to be a hefty 0.527s.
Dovizioso had initially usurped the top spot in the next hour, eclipsing Marc Marquez’s Wednesday benchmark using a 1m59.562so called laptime that for a time appeared place to fasten him the day’s honours.
LCR Honda’s Cal Crutchlow, which makes his come back onto a MotoGP motorcycle after a major foot injury cut his 2018 campaign short, had come within 0.004s of Dovizioso’s lap a few minutes later, however it took another five hours before the German has been finally deposed.
Rins, that flew heading into the last moments, first improved to sixth place and then recorded a 1m59.424s to grab the top spot.
But Vinales went quicker still, documenting the test’s first sub-1m59s effort.
As Crutchlow, that had a crash in Turn 5, settled , pramac Ducati’s Jack Miller was just another rider to improve grabbing third position from works riders Dovizioso.
a few hundredths sat supporting Yamaha teammate Vinales to get most of the test but ended up , seven tenths down, after the Spaniard charge.
Tito Rabat (Avintia Ducati) passed Marquez (Honda) late on for what could ultimately wind up being seventh place, with the still-injured Marquez once again finish his programme for the day several hours early.
Pramac newcomer Francesco Bagnaia crashed during the daytime, but went on to complete as the most useful of those Moto2 graduates in 12th.
Aleix Espargaro headed Aprilia’s efforts while rookie Fabio Quartararo upgraded to your Yamaha, edged Petronas SRT teammate Franco Morbidelli at 14th.
Stefan Bradl shot 16th, heading KTM’s Pol Espargaro — that was thrown off his RC16 at Switch 1 due to his next crash in two days — and Aprilia’s Andrea Iannone.
Rins’ Suzuki teammate Joan Mir had another day, the Moto2 graduate finishing 21st.