Your motor is a very early one, 1923. That shift mechanism was only used in ’23, AFAIK, and was replaced with the more common up/down version. The tank is not painted, it is polished brass. The brass tank was used on all of the early Sportwins, then later it was only used on the NS saltwater version. The carburetor was unique to 1923, photo attached. Cylinders were grey, all other years were blue. Nothing else was painted.
Private message me if there is any other information you want about the Model N Sport Twins and Sportwins.
Tom Manley
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This reply was modified 4 years, 11 months ago by Tom.