Oklahoma DPS troopers say it happened just after 11 at the intersection of County Road 1465 and County Road 2040 in Greer County. They say 65-year-old John Malcolm Junior of Mangum was driving a 2006 Kawasaki motorcycle.
He failed to negotiate a curve and the motorcycle left the road and hit a culvert throwing Malcolm 214 feet.
Troopers say Malcolm was not wearing a helmet.
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