I lost my key a while ago. I ended up putting the lights (temperature, reverse, and neutral) in the radiator cover, by drilling holes where there was space. Then i put a rocker switch on the plastic to toggle it on and off. I wouldn't recommend just hot wiring it and relying on the kill switch. If you do that, the power will always be on and running to the bike. You might not be able to start it, but if you leave your lights on, fan running, etc., it would kill your battery.