Neutral works fine
Ok here is the longlist of wires

Black & Blue joins to Green Red, black Yellow,Green Orange
Light Green Red joins to Black White, Green Pink ,Pink
White joins to White Red

green goes to earth and so does the selected gear as expected
earth goes round the sun

I saw on the wiring diagram(on this site) that yellow and green should go to green when I did this the rpm gauge stops working (doesn't fix the problem either )

Is the mc21 sp wiring different to that of the r model