Pramac Ducati rider Danilo Petrucci topped the timesheets on the second day of MotoGP's first pre-season test at Sepang, which was interrupted by a high-speed tyre failure for Loris Baz.
Towards the end of the first hour of the session, Baz was thrown from his Avintia Ducati along the start/finish straight at 180mph as his rear tyre failed.
The Frenchman miraculously emerged unscathed and was able to walk back to the pits.
"The rear tyre locked up when I was doing 290km/h," explained Baz. "At the last corner I felt something strange and I thought about completing the lap and coming in.
"At first I thought it could be the engine or the gearbox, but finally it looks like it was the tyre. I was very lucky."
While Michelin is uncertain exactly what caused the failure, the French firm's technical director Nicolas Goubert said it may have been related to tyre pressures.
"These bikes don't have a pressure sensor on the tyre, although what we do is recommend a minimum and maximum pressure," he said.
"It might be possible that what happened has something to do with it, although until we have the results of our test we won't know."
As a precaution, the soft Michelin tyre compound was withdrawn from use once the session was resumed after an hour-long investigation into what caused the failure.
Lorenzo on the pace
This resulted in Petrucci - who had set his best lap of 2m00.095s shortly before Baz's crash - remaining on top for the rest of the session, albeit just 0.060s clear of Day 1 pacesetter Jorge Lorenzo.
The factory Yamaha rider, recovering from an earlier crash at Turn 5, set his best time of 2m00.155s in the very closing moments of the session on the harder tyre, putting him less than two tenths ahead of Baz's Avintia teammate Hector Barbera.
Marc Marquez was fourth, 0.798s off the pace, on the best of the Repsol Hondas, with Cal Crutchlow making a late jump to fifth aboard the satellite LCR machine.
Valentino Rossi was another late improver, going sixth fastest ahead of the Ducatis of Andrea Iannone and Scott Redding - albeit some way off Lorenzo's pace for the second day in a row.
Casey Stoner finished his first competitive session since his retirement in ninth place aboard last year's Ducati GP15, just over a second off the pace with a time of 2m01.103s, a second up on his best effort from private testing on Saturday.
Tech 3 Yamaha's Bradley Smith completed the top 10, while Dani Pedrosa on the second Repsol Honda could do no more than 12th, 1.380s off the pace, behind Maverick Vinales on the best of the Suzukis.
Full testing times:
|1||Danilo Petrucci||Octo Pramac Yakhnich||2:00.095||46|
|2||Jorge Lorenzo||Movistar Yamaha MotoGP||2:00.155||0.060||32|
|3||Hector Barbera||Avintia Racing||2:00.387||0.292||32|
|4||Marc Marquez||Repsol Honda Team||2:00.843||0.748||52|
|5||Cal Crutchlow||LCR Honda||2:00.899||0.804||55|
|6||Valentino Rossi||Movistar Yamaha MotoGP||2:01.021||0.926||54|
|7||Scott Redding||Octo Pramac Yakhnich||2:01.049||0.954||42|
|8||Andrea Iannone||Ducati Team||2:01.052||0.957||39|
|9||Casey Stoner||Ducati Team||2:01.103||1.008||45|
|10||Bradley Smith||Monster Yamaha Tech 3||2:01.107||1.012||59|
|11||Maverick Vinales||Team SUZUKI ECSTAR||2:01.421||1.326||59|
|12||Dani Pedrosa||Repsol Honda Team||2:01.475||1.380||36|
|13||Yonny Hernandez||Aspar MotoGP Team||2:01.644||1.549||41|
|14||Andrea Dovizioso||Ducati Team||2:01.723||1.628||35|
|15||Pol Espargaro||Monster Yamaha Tech 3||2:01.992||1.897||32|
|16||Aleix Espargaro||Team SUZUKI ECSTAR||2:02.092||1.997||39|
|17||Tito Rabat||EG 0.0 Marc VDS||2:02.328||2.233||54|
|18||Stefan Bradl||Aprilia Racing Team Gresini||2:02.372||2.277||45|
|19||Loris Baz||Avintia Racing||2:02.611||2.516||26|
|20||Katsuyuki Nakasuga||Yamaha Test Team||2:02.691||2.596||43|
|21||Alvaro Bautista||Aprilia Racing Team Gresini||2:02.876||2.781||52|
Additional reporting by Oriol Puigdemont