Story highlights Motorcycling star Casey Stoner confirms his switch to sports car racing

Two-time MotoGP world champion will drive a V8 Supercar this year

Stoner criticizes some MotoGP fans for their behavior, saying he was spat at

Australian says he "fell out of love" with motorcycling after 10-year career

Former motorcycling star Casey Stoner has ended speculation about his future by confirming he will switch to four wheels to drive in a V8 Supercar, but not before taking a sideswipe at officials and fans.

The two-time world champion quit the elite MotoGP class at the end of the 2012 season, having announced his premature departure last May.

"I just fell out of love with the sport. We had a lack of respect from a lot of people around the sport and I didn't like the direction it was taking," he was quoted in Australia's Daily Telegraph newspaper on the same day he confirmed his new career move on Twitter.

"We got spat at (by fans), they tried to knock us off scooters going from the motor homes to the pits, everything like that."

The 27-year-old Australian said the death of Italian star Marco Simoncelli at the Malaysian Grand Prix in 2011 had also been a major factor in his decision.

JUST WATCHED Remembering fallen MotoGP star Replay More Videos ... MUST WATCH Remembering fallen MotoGP star 03:35

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JUST WATCHED Tributes pour in for Simoncelli Replay More Videos ... MUST WATCH Tributes pour in for Simoncelli 05:36

Photos: Marco's Memories: A year on in Malaysia Photos: Marco's Memories: A year on in Malaysia Memories of Marco – As MotoGP returns to Malaysia for the first time since the tragic death of Marco Simoncelli, the Italian's memory is very much to the fore of the sport. Here, a fan of the rider, shows her devotion with a tattoo in tribute to her hero who died following a fatal crash on October 23 2011. Hide Caption 1 of 6 Photos: Marco's Memories: A year on in Malaysia Fatal finish – Simoncelli was killed on the second lap of the race after losing control of his bike and being hit by Colin Edwards and Valentino Rossi at turn 11 at Sepang. The 24-year-old Italian suffered trauma to the neck, head and chest after his helmet flew off in the collision. Hide Caption 2 of 6 Photos: Marco's Memories: A year on in Malaysia Never forgotten – The whole of the MotoGP world stopped in silence at the unveiling of a plaque in memory of the Italian during the ''Tribute for Marco Simoncelli' ahead of the race in Malaysia. The number '58' which was Simoncelli's number and his nickname 'Sic' are both included on the memorial. Hide Caption 3 of 6 Photos: Marco's Memories: A year on in Malaysia Paying tribute – Marc Marquez of Spain and Team Catalunya Caixa Repsol touches the plaque during the ceremony. The Spaniard, who is hoping to claim the Moto2 title this weekend, looked emotional throughout the ceremony. Hide Caption 4 of 6 Photos: Marco's Memories: A year on in Malaysia Marching on together – MotoGP teams and officials came together at Sepang to remember the former rider during the 'Tribute for Marco Simoncelli' ceremony. According to 2011 world champion Casey Stoner, the incident is "a lot more fresh on everyone's mind being the anniversary." Hide Caption 5 of 6 Photos: Marco's Memories: A year on in Malaysia Holding back the tears – Fausto Gresini, team manager of San Carlo Honda Gresini, looks on struggling to hold back the tears. Simoncelli was the second rider Gresini has lost following the death of Japanese rider Daijiro Kato in a gruesome crash at Suzuka in 2003. Hide Caption 6 of 6

"We lost a rider a couple of years ago and within a month it was like it never happened," Stoner claimed.

"They want to see biff and barge and they don't realize our lives are on the line. We became puppets in that world and it had nothing to do with racing."

Stoner will drive for Red Bull Racing Australia in 2013, competing in a car which won the 2010 edition of the famous Bathurst motor race.

He tweeted: "Very happy to have a chance to race with @redbullracingAU in the Dunlop Series this year. Looking forward to getting on track at Clipsal!"

Stoner, who has previously tested sports cars, will initially compete in a development series.

His former arch rival in MotoGP, Italian legend Valentino Rossi has also been l inked in the past with a move to four wheels with Ferrari

But seven-time champion Rossi has stayed loyal to MotoGP and will return to Yamaha for the 2013 season.

Meanwhile, Stoner will carry over his famous No.27 from his former sport into motor racing.

Injuries from a crash in May cost him the chance of winning a third world title last season, but he signed off for Repsol Honda with a win in front of his home fans at Philip Island in November.

He started out in the 125cc class in the early 2000s before moving up to MotoGP in 2006, and won the world title the following year and again in 2011.