Bonneville America Forums Forums General Motorcycle Forums Other Bikes This is a Harley I would buy.

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This may be America's first REAL sportbike (thanks to Austria).

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But, I thought this was Americas first sportbike,
http://www.motorcyclemuseum.org/classics/bike.asp?id=13
At least the name says so....

It's also where BMW learnt to make flat twins.

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From HD?
If at all (BMW already had vast experience building aero engines), I don't think BMW would have needed to look that far west (to HD).

If you read the article further down you will find HD was "influenced" by British Douglas Motorcycles:

""Bob McClean ... owner of this rare 1922 Sport Twin, notes that it was clearly influenced by machines produced by Britain’s Douglas brand, which pioneered the opposed-twin design more than a decade earlier.

In building the Sport Twin, Harley took Douglas’ lead in orienting the cylinders in line with the frame.""