key

I just bought a lifan 125cc motor got it all installed but am haveing a few prob 1 there is an extra blue wire coming from the cdi box I don't know what it goes too need help?? And 2 there are two pairs of wires each haveing a black with white strip and a green n both were do they go I think...

Hello, i have always wanted a key switch on my pit bike not only for security but it also looks more of a professional bike with the key (people say that it wont do jack to stop people joyriding or stealing saying someone would just unplug it and off they go i see it this way if they are dumb...