2 Strokes Down Under

hi folks was wondering if anyone can help me with the colour of the wires for tacho on this model would like to fit one as I am going to use this bike for classic racing, I don't have the original tacho so hence the question cheers acco

I dont have a wiring diagram, but any 350 F2 should be the same... bear in mind some of the tacho wires output very high volts and may kill a modern dash tacho...