I dont have a kill switch so i turn on the cebator (?) on the carburator and i turn the throttle 100% so it doesnt get air, and it turns off. Or the other way is to stop and release the clutch.
If you have the choke lever on the handlebar then yes.. when wanting to stop the engine move it from the position when your riding freely (which is open position) to where your engine wants to cut out(closed position) to starve it of air...
It will making a bogging down sound then cut out...
with the cns carby it should have indications on the lever for what On/Off settings are. find the off setting so when you want to stop the engine you flick it to off