JEFFERSON — The engines will soon be revving up at Diamond Don Rainey’s event center in Jefferson as the 18th annual AHRMA International Vintage Motocross event gets underway Sept. 10-13.

ELKHART LAKE, Wis., June 6, 2012 - Classic motorcycles will race at Road America, June 8-10, during the American [Historic Racing Motorcycle Association (AHRMA) Vintage Motorcycle Classic.