It was a slow start to action at Valencia as sunny skies hid cool air temperatures, but the engines soon fired up to full speed once the first forays had been made.
By the end of the first day, Maverick Viñales was top, taking over in P1 late in the day and ending the day two tenths clear of Johann Zarco.
Yamaha had four combinations of chassis and engine to test, with Zarco, meanwhile, setting his fastest lap on the 2017 M1.
The big visual headline from the early part of the day saw Viñales head out first sporting a new aerofairing on his M1, and it wasn’t long before teammate Valentino Rossi did the same.
Viñales put in 80 laps, Zarco 53 and Rossi 63, as the ‘Doctor’ took fourth on the timesheets to slot in just behind reigning World Champion Marc Marquez.
Just before midday there was a dramatic crash for Rossi at Turn 10, with the number 46 soon on his feet and walking over to look at the bike. Back to the pits soon after, Rossi was unhurt and headed back out.
Marquez, meanwhile, was the last man out on track and did 70 laps as he began his campaign to defend the crown – already. His best was just over a tenth slower than Zarco, and began the day on the 2017 bike before trying a modified version and then the 2018 bike – with a new chassis, new engine, and new exhaust – “almost everything new”.
Teammate Dani Pedrosa did 52 laps, and ended the day in P11 after his Valencia GP victory on Sunday. Cal Crutchlow, on the first LCR Honda machine, finished up in tenth after 55 laps.
Jack Miller was the standout debutant as he rode a Ducati for the first time, going fifth fastest and almost immediately quicker than his fastest lap in the race on Sunday – and quicker than any lap put in during the race on Sunday.
He was the fastest Ducati, with the Borgo Panigale factory’s Andrea Dovizioso and Jorge Lorenzo slotting into P7 and P8 respectively – both putting in around a half century of laps. Danilo Petrucci (Octo Pramac Racing) took P14 after 46 laps, just behind Tito Rabat– with the former intermediate class Champion putting in 70 laps on his first day on a Ducati.
Aleix Espargaro was sixth and fastest for the Noale factory after 51 laps, with new teammate Scott Redding settling in in P15 on Day 1.
Pol Espargaro took ninth after 56 laps, with teammate Bradley Smith putting in a similar count of laps to end the day in P12 as the Austrian factory head into their sophomore season.
Takaaki Nakagami was the fastest rookie in P17 after 76 laps, with reigning Moto2 Franco Morbidelli incredibly close behind in P18. Xavier Simeon put in 43 laps on his first run in the premier class, returning from injury and ending the day in P20. He also suffered a lowside crash earlier in the day.
Alvaro Bautista suffered a big crash early in the day after a mechanical problem, and went to hospital for precautionary checks. He sat out the rest of the test day, although was confirmed with no fractures.
There were more issues of a different nature at Team Suzuki Ecstar as Andrea Iannone and Alex Rins were both sidelined with a virus, and are hoping to get out on track tomorrow.
2018 season will be the last of partners
Sepang test 2018: Lorenzo dominates on d
Sepang test 2018: Vinales edges Rossi to
MotoGP Sepang Test 2018: Pedrosa fatest
Yamaha reveals 2018 MotoGP livery in Mad
Vinales signs new contract to remain at
Folger decided to sit out the season in
Syahrin joins Tech 3 for 2018 MotoGP sea
Honda unveil new 2018 MotoGP livery in J
Aspar renamed 'Angel Nieto Team' in trib
New MotoGP Championships, wild card rule
Iannone back on top of the MotoGP timesh
Dovizioso fastest on the second day at J
Huichol style helmet for Rossi at Sepnag
Iannone takes to the top of the timeshee
Marquez quickest in Valencia Day 2
Perdosa happy to end the season with a w
We wanted this title as much as Marc did
Marquez hails "an incredible opponent" D
Zarco sees he must be happy not sad afte
Marquez crowned Champion, Pedrosa wins d
2018 MotoGP calendar updated
British GP to remain at Silverstone for
Zarco thinks he can fight for the win on
Marquez would be more nervous if Dovizio
Marquez heads the timesheets & automatic
Iannone tops Valencia FP1, with Marquez
Folger making progress on the road to re
2018 MotoGP provisional entry list
Moving to Ducati was the right decision
A "step" with the bike gives Pedrosa con
We made the best of what we had - Davies
Pol Espargaro please by KTM’s progressio
Rossi feels Yamaha could have been compe
Zarco was thinking he could win
Dovizioso top in Warm Up, Marquez eighth
Dovizioso feels ready for the 25 points
The rhythm is more of a question for the
Marquez fastest in FP4 after recovering
Dovizioso heads FP1 as action opens at S
Van der Mark targets to improve in every
Viñales planned to push in the last 5 la
Aleix Espargaro forced to si out of Mala
Crutchlow says this is what MotoGP is al
Iannone trying his best on every lap
Dovizioso will have to give it our all i
Zarco so happy he could fight for victor
If you don’t want to play the game, stay
Marquez wins the fight for Phillip Islan
Marquez leads Viñales and Pedrosa in wet
Dovizioso: “The reality is different to
Marquez throws down the gauntlet with po
Marquez tops wet Philip Island FP3
Crutchlow expecting "a big battle" at Ph
Aleix Espargaro heads Marquez & Dovizios
Lowes feeling great with the R1
Pedrosa had no control on the bike at th
Lorenzo unhappy with Zarco's move at Mot
Dovizioso & Marquez speak about their du
Petrucci was starting to think about his
Dovizioso wins last corner duel to beat
Zarco takes shock pole in Japan
Dovizioso leads the way to Q2, Rossi thr
Crutchlow & Lorenzo disagree over FP1 cr
Aleix Espargaro aiming for podium after
Japanese GP: Dovizioso beats Marquez to
Marquez tops Japanese GP FP1 as rain mix
Nozane to replace Folger at Motegi
Motegi GP Preview: The heat is on
Folger forced to withdraw from Japanese
Rossi did everything possible to get pre
Marquez had to revert to 2016 way of thi
Smith and Espargaro confirmed at KTM for
Aoyama to replace Miller at Motegi
Marinelli to leave Ducati at the end of
Title key is is to treat all rivals equa
Training accident rules Miller out of Mo
Aleix Espargaro thought h could have a g
Vinales suffered from tyre choice at Ara
Rossi "quite proud, very happy and satis
Marquez "took a lot of risk" to win home
Lorenzo feels he is getting closer to th
Marquez leads Spanish podium lockout and
Morbidelli takes victory under pressure
Vinales pleased to be on pole
Lorenzo believes a good start will be th
Rossi thinks he can do the race but know
Marquez thinks "pushing a bit too much"
Oliveira snatches pole from Pasini and M
Vinales takes pole, incredible front row
2017/2018 MotoGP test calendar released
Moto2 FP3: Morbidelli leads Pasini in FP
MotoGP FP3: Marquez tops session, Rossi
Pedrosa: "Tomorrow we’ll see which condi
Rossi quite happy and did not feel a lot
Lorenzo happy with "quite competitive" d
Loris Baz set to move to WorldSBK in 201
Moto2 FP2: Pasini tops final session of
MotoGP FP2: Pedrosa sinks into the 1:59s
Moto2 FP1: Luthi takes control in wet FP