Contact Danny McKenna for availability and pricing. (inquire at dmckenna@mckennacars.com or text (562) 879-7347)
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1926 Super X Board Track Racer

Excelsior's Super X motorcycle could well have been a Harley-Davidson back when Arthur Constantine presented his new unit construction 45 cubic inch V-twin design to their upper management in 1924. Disappointed in their rejection, he rolled up his plans and joined the Excelsior Motor & Supply Company, the manufacturer of Excelsior and Henderson motorcycles. Ignaz Schwinn's company was much more receptive and built the new Super X engine using current Henderson chassis parts to economize the production in late 1925.