Both hand and foot clutch. That's interesting. I can see the foot pedal operating an automotive plate clutch. I'm going to guess that the hand lever tensions the transfer pulleys. That hand clutch makes it practical to bump start. I don't know how the term bump start came about, but that's what the old timers called trotting along side of the bike and dropping the clutch to start the engine. What a wonderful and ambitious project. A real treasure.
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