right so i'm putting the bike back together, get to wire the fan back up and notice the wiring is different, before it was put through a domestic block strip and I didn't notice the colours!

So i've got a 'Black & Blue' of the fan and a 'Red & Grey' going to the bike, i'm hazarding a guess that black and red are live and blue and grey are neutral but not been a sparky i'm not sure.

any ideas?

Look in the documents library, the link is at the very top of the page, there's an SP wiring diagram in there which should help.

I managed to trace the wiring back to the original set further down the bike, someone has spliced in and added the grey and red wiring, but all sorted now thanks.