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Electric starter from bicycle sprocket - video
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No doubt that it works, but no mention as to how they get around the air cooling shield problems
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That won't work for very long. The tiny little pawls in the freewheel will wear the ends off in a very short period of time. I tried that a few years ago. I did modify the cover to fit back over the fan so the air worked as normal. It would be nice if it would work for a good while as it's an easy way to add a starter.
Mine only lasted about 5 hours worth of engine running time before it wouldn't catch at all anymore but it did work for a little while.
I've wondered if using one of those one-way bearings would work in it. Those are keyed too so it should be possible to substitute one of those for the freewheel.
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If we are talking about modifying the idea, why not cobble it up to the pull starter dog? That drops completely out of engagement once released
