Here, here and here I went on about the possibility of an early racing motorcycle inspired moped. I should have known. I’d already figured out (second link) that is wasn’t an original idea – now I discover that there’s at least one forum with a section devoted to the notion. My peregrinations started at Ride the Machine, with a post that led to Boardtrack Builder, Tobias Björklund’s blog:

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Which led to this build thread:

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I very much like this picture (used for frame layout).

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Which led to Halcyon Cycle Works, where one can get a frame, leaf spring fork or the whole enchilada:

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First things first – I have a bicycle project (100% human power) to work on, but dreaming doesn’t cost a nickel. I wonder if there was a board track sidecar class…