Moates died Dec. 7 from self-inflicted gunshot wounds in La Costa, the San Diego County Medical Examiner’s Office and a spokesman for Moates’ clothing line, Eric Johnson, both confirmed Wednesday.
Friends were surprised by Moates’ death, but said he had been in a great deal of physical pain from old motorcycle-related injuries and stomach ulcers.
Moates, a San Diego native who went on to became a founder of Carlsbad-based sportswear firm No Fear, was 23 when he rode his privately owned Yahama to victory in the U.S. Grand Prix.
Moates is survived by his wife, Heather, and a son, Dakota.
The family asked that instead of flowers, donations be sent in Moates’ memory to Loma Linda University Children’s Hospital.