The MotoGP field is yet to complete a lap on the tyre they will race with in Sunday's Argentina MotoGP round.
Following a scary FP4 failure for Scott Redding, Michelin has withdrawn both the medium and hard compounds used so far this weekend. They will be replaced by a different medium tyre of a stiffer construction.
“It's a very strange situation that I've never encountered before. Unfortunately we had some issues in the recent past and it's definitely not a comfortable situation for the riders and the teams, but things are like that,” commented reigning world champion Jorge Lorenzo.
“I have great respect for Michelin and for the efforts they have put in these last few months to improve the 2016 tyres. Even considering this last inconvenience, I'm sure they will keep on working because safety is the first priority in racing.
“Tomorrow the race will be extremely difficult. We'll have to start from zero but at least this is the same for all riders. Let's see how it goes tomorrow morning.”
Lorenzo and his Movistar Yamaha team turned around a dire opening day to qualify third on the grid, behind Honda's Marc Marquez and team-mate Valentino Rossi.
“For sure yesterday we were in a difficult situation because, with a dirty track, our bike looks like it struggles more than especially the Honda. But luckily the track improved so much this morning with more rubber I was very competitive and consistent,” Lorenzo said.
The Spaniard's qualifying was also hampered by an accident in final practice, which sent his M1 bouncing through the gravel.
“We were a little bit unlucky with the crash, because with two bikes we could have put a new front tyre and been a little bit faster in the last stint. But I think it's a good place to start tomorrow.
“We know that Argentina and Austin are not the best tracks for us, but we have to solve the situation as well as possible. Try to fight of the win if it is possible and stay on the podium if we cannot.”