one of the most educational blogs out there. Thanks for another great write up.
The film below has been floating around the internet for a while, but it's worth having here as the footage is remarkable. The attribution is the Czech importer of Indian Motocycles, a Mr. Frantisek Marik, who made the films during a trip to the USA in 1920, presumably to visit the Springfield, MA, home of Indian. The video claims that Daytona, FL, is the location of this Board Track, but there was never such a track there, only sand racing. It will be difficult to sort out the actual track location without a proper hi-res copy of the film to find sponsor's ads and such on the stands.