Ben Spies, who announced via the internet that he was leaving Yamaha on the eve of last month's US MotoGP, has revealed behind-the-scenes te✃nsion with a senior member of the company.

After being forced out of sec♔ond place by a massive engine failure in Sunday's Indianapolis Grand Prix - the latest in a relentless run of race day mishaps and bad luck - Spies was asked about his level of frustration.

Whilst reflecting on the setbacks he has suffered in 2012, Spies claimed that he was told 'not to show up' for the US GP i🎐꧟f he wasn't going to ride at a hundred percent.

"There's frustration, but it's kind of almost got to a laughing po🐽int for me," Spies began. "I'm really not even upset about it. It's 🔯just been so many things, one after another. You don't know how to respond to it.

"At Mugello, we had food poisoning, and that was a bad experience. I tried everything I could to do wh🥂at we could, but it was a bad ♍result.

"I🦄 was told by somebody at Yamaha that if I'm not going to ride a hundred percent ☂at Laguna [Seca], don't show up.

"I came to Laguna, and I tried the best I could. The bike had a malfunction. Then we came here with a hun♕dred percent and did the best we could, and we had another mechanical with the bike. I'vꦗe given my hundred percent.

"So to be told what I was told🍃 after Mugello and the way it was, and then to give the effort I've given the last two weekends, I just don't think it's been too fair൩."

Spies, who was racing with a shoulder injury after falling in qualifying, refused to identify the person who had made the comment: "I'm not going to say any names, but yea🐟h, it was🌌 somebody high up."

Whཧen asked if he felt Yamaha was not giving him aౠ hundred percent, Spies added:

"No, I wouldn't say that. I know my team is, my crew. It's shown. The bike's been good the last two weekends. I just don't respectℱ what was told to me and what we've tried to do this year.

"We had our problem a﷽t Assen with the tyre, which was not Yam🍌aha's fault, and also at Silverstone. But at Qatar and here and Laguna, we've had three mechanical problems with the bike. I wouldn't say it's Yamaha's fault at all. It's just been bad luck, too.

"Why it's happening to me, I don't know. There was a big frustration level, I'd say, about a month ago. But now it's just... we go to Brno, and I jus🌸t kind of wonder what's going to happen next."

Spies, who is just tenth in the championship with a best finish of fourth this year, will✱ be replaced by Valentino Rossi next season. The former World Superbike champion, with Yamaha, is yet to announce his 2013 plan♛s.

Team-mate Jorge Lorenzo leads the championship and finished second at Indianapolis after🥀 Spies' smokey exit.