A fast fall in the closing stages of MotoGP FP2 at Circuit of the Americas left Eugene Laverty 17th on the Friday timesheets.

But most frustratingly for the Aspar Ducati rider, who claimed a career best fourth place last Sunday in Argentina, it also destroyed one of his favoured front tyres.

"The new front tyre is pretty good. That was the one I crashed on, but it feels more like a Bridgestone, more stable. I was maybe a bit too comfortable on it at Turn 2!" Laverty said.

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"I hit the deck and lost my chance to go quicker. [The lap times are] pretty close and a few tenths could have brought us up in there.

"But the most frustrating thing about the crash is that the front tyre was destroyed, it was a new [medium] front and we don't have many of them. I think it'll be the race tyre. So we'll have to ration them for the rest of the weekend."

The Irishman revealed that the Michelin tyres seem to be getting ever closer to the character of the former Bridgestone rubber.

"They are starting to feel more like the tyre from last year now. The rear is starting to feel a little bit more like that and then this new front tyre is starting to feel a little bit more like Bridgestone," he said.

"Every track is going to be different of course, but the thing is you are getting a lot of input from riders who have been riding these tyres for so many years - the development is going to go in that direction."

Laverty only received the full GP14.2 package during round one in Qatar and, combined with the magnitude of the tyre changes at each round, is yet to find a base setting.

"I haven't got a base setting yet, but I'm sure a lot of people are in the same boat where they are having to change the setting all the time because of how different the tyres have been at each circuit so far. That's why you need a good crew around you and I'm fortunate here."

Laverty was half-a-second from his goal of a top ten place on Friday.

By Peter McLaren