No Spark on the 510

Picked up the 87 510 tonight, nice complete bike that originated from the USA and has found its way to the uk, the electrics were disconnected and it was advertized as no spark, at the coil I have an orange green red and black and the loom from the motoplat has green red black and 2 yellows, can anyone tell me the connections and any testing info to find out if its the coil or motoplat that is faulty, I have a book coming but its yet to arrive.

There is a troubleshooting guide in the website for Motoplat repair under services in the forum. Sorry I dont have the direct link but it is Vance Smith

9 of ten times it's gonna be the stator that fails. $$$ for a new stator.
What you have there is a 70+70W (two yellows indicate that) system.
Sorry I can't be more help.

So the 2 yellows are lighting and the orange at the coil cutt out is that correct Thanks