Killswitch question...

[Gizmo2020]

I have a 43cc gas scooter project, I've had to gut all the wiring leaving the sparkplug and two other wires , the same color.....I need to wire a killswitch with a inline fuse & two position keyswitch .....there's little on these engines as far as wiring .....

 

[darwin]

Generic version for a 50cc Chinese scooter.