Thanks Max
What machine is this wiring diagram for? It does not correspond to my machine. It hows two pairs of wires going to the rectifier but I only have the two yellow wires and the black coming from the stator to the connector for the rectifies. The connector only has room for 4 wires - two yellow, one black an one purple. The purple wire is not coming from the stator though. It goes from the rectifier into the harness and I'm assuming to the battery positive.
In your last picture it looks like they have hooked up multimeters to two separate circuits coming from the rectifier...as far as I can see, I only have the one circuit (plus the black for earth)... I'm a little confused here,,,