Millionaire Zef Eisenberg injured in high-speed motorcycle crash

A millionaire businessman has been airlifted to hospital with a suspected broken pelvis after coming off his gas turbine-powered motorcycle at a track day.

Zef Eisenberg, 43, had been riding the high-performance machine at the Straightliners Top Speed event at Elvington Airfield in North Yorkshire.

Mr Eisenberg, who founded the sports nutrition company Maximuscle, was taken by helicopter to Leeds General Infirmary after coming off his bike at about 2pm on Sunday.

A spokeswoman for the Madmax race team, which Mr Eisenberg owns, said: "He is in a stable condition and is receiving the very best care."

Press Association photographer Danny Lawson was at the event and said the accident appeared to have happened after Mr Eisenberg entered the slow-down area.

"Something happened out of sight and there was a big puff of smoke," he said.

"They stopped the event for at least an hour and a half."

Event organiser Trevor Duckworth said the cause of the accident was being looked into.

Mr Duckworth, a former motorcycle racer, said some of the racers at the event have reached more than 250mph.

The Madmax website says it is "most known for its dedication to racing and building turbine-powered motorbikes for extreme speed.

"Madmax racing holds numerous Guinness, world, British and local records."

Mr Eisenberg sold Maximuscle to GlaxoSmithKline (Other OTC: GLAXF - news) for £162m in December 2010.