The Yamaha two-seater is a full-specification 500cc machine like those raced by Italian superstar Max Biaggi and Australian multiple GP winner Garry McCoy, but with an extra seat for a privileged passenger.

A keen motor sport fan, Sarah Jane was recently crowned "The Queen of the Internet" when her official website broke the world record for the number of downloads in one day, with 2.25 million people downloading pictures from her site.

The cyber beauty, who is now receiving up to eight million visits a day at the site, is set to hop on board the two-seater bike at Victoria's Phillip Island on Thursday, October 11 - the day before the world's best racing begins at the Grand Prix.

Her "chauffeur" for two hot laps will be American Randy Mamola, a 13-time GP winner who thrills his passengers with speeds up to 280kmh down Gardner Straight and the incredible braking power of the 500cc machine.

Sarah Jane said she loved motorcycles and was a regular at the Qantas Australian Motorcycle Grand Prix.

"I'm a bit of a dare-devil," she said. "I grew up with motorcycles. I had a Honda 50 when I was six. I've been 'bitten' (crashed) a few times and have got the scars to prove it."

Proud that she had become the World's Most Downloaded Woman while keeping her clothes on, Sarah Jane promised to repay Mamola for her two-seater treat with a thrill ride into cyberspace.

While Sarah Jane has scored one of several guest rides on the Thursday, four lucky competition winners will experience the adrenalin-pumping power of the Yamaha two-seater on GP Friday, October 12.

Buying a ticket for the Grand Prix by October 2 automatically puts the purchaser into the draw to win the ride around the famous Phillip Island circuit with Mamola.

A single-day ticket earns one chance to win, while a three-day general admission or grandstand ticket triples the chances.