First sold in America in 1966, By the time the 1970 Hagon catalog was made the Hagon Dragster chassis had lost the separate fuel tank as shown on this early pre-unit Triumph type.
The tank was still listed in the 1970 catalog as it was originally designed for British Grass Track, Speedway style racing.
At the top of this page is the 1970 frame that holds both gas and oil and set up for unit construction Triumph engine. Listed for BSA A65 and Triumph unit construction only. You never really see the "rubber band" type forks in America. Mostly forks from small Japanese motorcycles were used with Hagon frames in the U.S. Below it is the far more rare twin top tube Hagon JAP Replica frame. This design was favored by the top dragbike builders in the early to mid 1970's. 
You'll see reversed cylinder heads quite a bit on English built Triumph drag bikes, done to accommodate the fitment of Shorrock superchargers. The Brit's were far more successful than Americans at making blowers work on their two wheeled dragsters. The "Mirage" above is a classic example of the British built dragbike, super light weight, low to the ground and supercharged.
The lucky Hagon Dragsters made it to a happy retirement on the show circuit. This BSA engined Hagon dragbike clip comes from a 1976 Street Chopper article on a custom show in Detroit. The front wheel size and lack of brake would have kept this machine from competing under the current rules of the time. If anyone knows of the whereabouts of a A65 chassis like the one above for sale or trade email: kustomhut13@yahoo.com
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