Look at this, this is the wiring diagram of the Honda Wave 125S. I found this Honda motorcycle wiring diagram on 4shared but unfortunately not very clear detailed picture there.
Honda Wave series, also known as Honda NF series, Honda Innova (in Europe), and Honda Supra (in Indonesia) is a series of small motorcycle models (known as an underbone) manufactured by Honda Motor Co. Ltd
Honda Wave comes with three displacement options – 100cc, 110cc and 125cc. In addition to the three models that use carburetors, Honda also produces the fuel-injected model, the first underbone that uses fuel injection.