Honda Shadow Hand Shift Hand Clutch

It's pretty easy to make a gate for a specific gear shift mechanism.

[stop ---__down__--stop--__in gear / N__--stop--___up___---stop] .......................OR................... [---____---____---____---]

Actually that is symbolic, you need a central gate, with ramped movements, into the shift action and a straight slide back down into the central gate.

Also the 45's had a foot clutch.... with a camming leverage action to open and lock the clutch open..

There is no overriding slipper acton because that TINY little gear shift shaft into the gear box, has a leverage aspect against it of about 4.5 times... 2Kg to shift gears by foot, and 10 Kg via the hand gear shift... AND that hand gear shit, is on the side of the bike and it's also floating in the open... It's a high risk and high damage kind of a set up. It needs a slipping release so if the energy performing the shift exceeds the input of a foot shift, the mechanism simply declutches the force