Motorcycles > Old Vintage Motorcycle, Parts & Accessory Advertisements
The Most Powerful Single Cylinder Engine Ever Put In A Motorcycle
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smallengineshop:
That's a big claim from Excelsior Supply Co, and maybe it was true in 1909. Here's a 1909 Excelsior magazine advertisement boasting about the power, reliability and craftsmanship of their single cylinder motorcycle engine. I wonder what they mean by "auto cycle?"
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