Dani Pedrosa launched a ferocious attack on Michelin after he suffered a disastrous Brno GP.
Struggling severely with front tyre issues, the Spaniard slumped to 15th place as he lapped over five seconds off the pace at times in what turned out to be an embarrassing 22-laps for the triple world champion.
Pedrosa even admitted he was ashamed to be so woefully off the pace and he said: “This weekend has been a complete disaster. Today’s race was probably the worst of my career.
"In fact I couldn’t even race today, all I could do was ride. I couldn’t control the bike, I didn’t feel safe. I was riding so slow, I felt impotent and ashamed. I considered stopping but I stayed out there to get some points. We really need a drastic improvement from the tyres.
"I had no grip at the front and no grip at the rear, from the first lap to the last. It was therefore impossible for me to push any harder, even though I was going very slow, three or four seconds slower than the leader.
"I almost crashed twice, so I just tried to finish the race. I did my best in very difficult circumstances, at the end the tyre performance was even worse than it had been during the early laps.