I have an old roketa mini 90cc that I am in the process of tearing apart and using the parts to build a go kart.

Problem is that I do not want to include the headlight or brake light or cheesy alarm system on it . . . .

So, how hard would it be just to make my own custom wiring harness for it?

Could someone give me an order as to how to wire it?

battery to solenoid to where to where to where?

I will most likely use a generic auto ignition key switch on it......