Jimmy Weinert began his racing career as an amateur dirt track and scrambles rider at the age of 16. He started racing professional motocross just as it was beginning to experience rapid growth and popularity in the United States. Unbeknownst to him at the time, he was one of the pioneers of a sport that continues to experience enormous growth.Jimmy the Jammer Weinert had an 11-year professional racing career winning a total of 22 AMA professional...