LONDON, Aug 11 (Reuters) - Sam Sunderland ⁠has taken a year longer than planned just to get to ⁠the start line of his record bid to ride a motorcycle around ‌the world in 19 days, but now the double Dakar Rally winner says he is ready to go.

The Red Bull-backed Briton launched his challenge last July, saying he expected it to be ​mentally tougher than anything he had done before, ⁠but he then broke his back ⁠in a training accident and had to put the adventure on hold.

The new ⁠departure ‌date is set for September 5, with Sunderland leaving London on his Triumph Tiger on a six-leg route taking in Turkey, southeast Asia, ⁠Australia, New Zealand, Canada, Morocco and back to London.

The ​37-year-old will have to ‌ride 1,000 miles every day on public roads and across deserts and ⁠cover a minimum ​18,000 miles in total.

The target time excludes ocean crossings, during which the clock is paused, but the journey must go one way around the world, touch two antipodal points ⁠and start and finish at the same location ​on the same machine.

The record of 19 days, eight hours and 25 minutes -- no longer recognised by Guinness World Records because of the dangers involved -- was set ⁠in 2002 by Britons Kevin and Julia Sanders for the fastest circumnavigation of the globe by motorcycle.

"This isn't just about riding a motorcycle. It's about managing sleep deprivation, making decisions when you're exhausted, adapting to whatever the road throws at ​you and continuing to move forward every single day,” ⁠said Sunderland.

"After everything that's happened over the past year, I am more excited than ​ever.

"Getting to the start line feels like a ‌victory in itself, but I'm not setting ​off just to finish. I'm going to try and set a benchmark that stands for years."

(Reporting by Alan Baldwin; Editing by Ken Ferris)