WORLD motorcycling champion Casey Stoner has stunned the sport by announcing he will quit at the end of the season for "family reasons".
The 26-year-old Australian, who has won 35 MotoGP races and leads the current standings by a point after winning two of the season's three events, made his announcement at a news conference ahead of Sunday's French Grand Prix.
"After a long period of thought and numerous discussions with my wife and family, I have decided to stop competing at the end of the season," the Honda star said.
"After so many years taking part in this sport that I love, and with all the sacrifices that I have had to make, I no longer have the passion to continue and I think that it is best to stop.
"I will go forward in different things in my life."
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