Looks like Gene was competing in the Pikes Peak Hill Climb, on a bike of course as determined by his Team Yamaha leathers. Don't know anything about the triple digit number, 11? maybe just for this event as they raced about 40 bikes to a class, all at once. Here he is checking out #1 on the Hill, in a perfect powerslide.
Pikes Peak Motorcycle Winner 1955 Don Tindall, 16.08.6
