Can I turn K5 off when I am not using it when bike is off
You don't have a switched power supply anywhere? For example, consider a rear light that switches with the ignition. Connect the yellow wire to this.
Connect the yellow wire to a switched mode power supply and your K5 will turn off automatically when you turn off the ignition on your motorcycle.
The advantage is that the K5 automatically switches on again when you switch on the ignition. So you can't forget to turn on the K5.
@Hans thanks I have a vfr1200fd can't find how to connect it