Performance Technical Racing manager Simon Buckmaster has launched a remarkably frank attack on Guy Martin after he was unable to secure a victory in the 2010 Isle of Man TT.

PTR, which also runs the front running Parkalgar Honda team in the World Supersport Championship, tuned and supplied bikes to Wilson Craig Honda for this year's island race, with Martin chosen to ride for them.

However, Martin was unable to get on top of the podium, prompting Buckmaster to label him as 'popular but flawed', before claiming he needs to 'change his attitude' if he is to ever consider winning.

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In a long comment piece submitted by PTR themselves, Buckmaster said:

"First off, it was a pleasure to work with Wilson Craig, he is a very shrewd operator who knows his stuff on road racing inside and out. He knows what he wants and has the means to achieve it and I sincerely hope that PTR has a long and successful relationship with him. It was out first year together and we learnt a lot about each other but I think we can win many races in the future.

"A second place in the Supersport race is a good result for Guy. Watching the DVD it is clear that the bike was more than competitive, overtaking just about anything on the straight. We'd expect that though because we produce what we believe is the best Supersport bike in the world.

"The Superbike was a new venture for us and while we built it to a specification below what we would use in WSB or BSB, which is necessary for a TT machine, it too was also more than competitive. Guy was challenging for the lead in the second Superbike race after leading on lap one when he crashed and would have finished second in the opener if it hadn't been for a time penalty. That's impressive for our first go at the island and I am proud of the PTR team involved - well done Alan and Mark.

"To be fair we would have liked a win but Guy Martin has yet to win around the island and 2010 was not going to be his year either - but even that I think is fixable. Guy is a quick rider who is immensely popular but he is flawed, he needs to listen to some advice if he wants to win at the TT as he says he does.

"I had numerous conversations with him and he listened but then completely ignored everything we agreed on. He didn't listen and didn't win; unless he changes his attitude he will never win. In fact when he talks in public, as he did in an Irish Racer Magazine recent feature, the way he relays his last conversation with me is the opposite of the truth.

"First thing Guy needs to learn is that the rules apply to him as much as anyone else. He may cultivate a "just another one of the boys'' image and have legions of admirers but it is not true and distracts him from the racing. How many of the boys have Aston Martins for a start - not many. How many race at the TT and have credible chances to win - again not many. It's all a facade.

"He needs to stop being distracted and lift his professionalism. Instead of being a TV star and courting publicity 24x7, he should be concentrating on racing and what's needed to win. Get his focus and concentration into racing, not promoting his name and money-spinning deals. At the TT he made a tyre company choice based more on financial gain to him than maybe the best tyre choice and paid the price.

"Once again he needs to drop the 'I am only interested in racing my bikes and sleeping in the van act' and actually show that winning is the most important thing to him; as they say actions speak louder than words. He has got better but still has another step to go regarding leaving the bikes to the mechanics and not to try to be the crew chief.

"Going back to his feature in Irish Racer Magazine he used unacceptable bad language and criticised a member of PTR staff and that upset me deeply. First, it was unprofessional and secondly the member of staff he criticised is one of the major reasons he scored as high at the TT this year as he did. PTR is challenging for a World Championship for the second year in a row and has nothing to prove - never a winner at the TT Guy Martin still has it all to prove.

"Another unprofessional move by Guy was to disrespect the Supersport podium ceremony and then follow that up by being downright rude and ignorant in the press conference. Eating and drinking while you are being interviewed has no excuse but then again this is all part of the problem that is stopping him from winning at the TT - he is not approaching it seriously or with a professional attitude, instead spending far too much time promoting this image of what type of person he is. Come on, under all of this Guy you can be a genuine person so just do it!

"And there is a serious point here because if he keeps up his unprofessional approach then he may never win a TT. Not only will his own preparations be flawed but there will be very few teams capable of fielding a winning bike that will want to deal with him. Mind you that might be the best thing for him because then he would have to buy and run his own team by himself and then he can do what he likes. The one thing he is unlikely to do in that situation is win...

"Now Guy may get annoyed with me for saying all of this but it is simply the constructive truth and if he listens then he will improve his chances of winning enormously. I for one hope he does listen, smartens up his act and wins many TT races in the future - and I'd be happy to help him achieve that."