Re: Hello, Motorbicycling!
You can use a key for security. Install it in the kill switch circuit so that the circuit is completed when the key is 'locked'. Or you could put a hidden toggle switch to prevent the motor from turning over. For real security, you need a bike lock. Otherwise, a theif is just going to pedal way.
66cc HT on vintage cruiser frame.
Micargi Rover with 79cc HF. The new project!