holds the outright TT lap record, covering the 37.75-mile circuit in 17 mins 12.3 seconds in 2009. That's an average speed of
Over the next fortnight, Martin will be joined by more than 200 men and women competing in the Isle of Man TT races, racing at an average speed of over 130mph - and topping 200mph at times - on closed public roads, with the best covering the 37.7-mile lap in under 18 minutes.
That's the equivalent of driving from Leeds to Sheffield in less than 20 minutes, on winding A-roads lined by stone walls and houses, while climbing a mountain in the middle.
The risks are obvious. But what if that danger is what attracts some people to the sport?
Steve ParrishBBC motorcycling commentator
"Now I've stopped racing I do think the TT is mad but I also think it is great. I'm a huge fan. I'm completely aware of the disasters and the dangers but people like Guy Martin love it to bits. They only want to do road racing, they find track racing boring. They get huge amounts of exhilaration from it and they are willing to take the risks, and that should never be stopped. You are pushing the boundaries. It's the last of the mad things people can do."
Martin, 30, told BBC Sport: "Short circuit racing is full of health and safety but the reason I ride a motorbike is because of the danger and there is no place more dangerous than the TT. I like pushing myself.
"I don't like routines, I like to be challenged and nothing beats the buzz of going round there."
Of course, not all short circuit racing, despite the run-off areas, controlled conditions and crash barriers, is as safe as Martin suggests.
And while deaths in motorcycle grand prix racing are fortunately rare - Simoncelli's was only the fifth since 1989 - 135 riders have been killed in the TT since it started in 1907, with 20 dying since 2000 alone.
But Martin, despite stepping on to the podium 13 times, has yet to win a TT and it is a target that keeps him returning despite the inherent risks.
"It is a right dangerous place and if you keep going back the chances are it will catch up with you," he said.
"When I win a TT, I will pack it in and find another challenge. Life is all about setting yourself goals and then achieving them.
"The TT taxes your mind.
TT deaths this century
29 May 2000, Whitegates
30 May 2000, Westwood Corner
31 May 2000, Greeba Castle
9 June 2000, Ballaugh
27 May 2002, Bray Hill
29 May 2003, Crosby
Serge Le Moal
29 May 2004, Braddan Bridge
2 June 2004, Black Dub
5 June 2004 , Quarry Bends
30 May 2005, Douglas Road Corner
4 June 2005, Parliament Square
10 June 2005, Rhencullen
29 May 2006, Ballahutchin Hill
8 June 2007, 26th Milestone
12 June 2009, Mountain Mile
10 June 2010, Ballagarey
10 June 2010, Quarry Bends
31 May 2011, Ballacrye
31 May 2011, Ballacrye
6 June 2011, Gorse Lea
"Don't let your mind wander - if it does then usually you're dead. A split-second lapse in concentration and you can clip a kerb - dead."
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