So, I managed to track down an Aprilia dash to fit to my RG500 to replace the Koso dash which replaced the OEM clocks (because the Aprilia front end I fitted to the RG doesn't have a mechanical speedo drive).

Anyway, I've now hit a showstopper with the adaption of said (Aprilia) dash to the RG's wiring, i.e. I can't figure out the logic of some of the individual circuits.
Some dash functions/lights seem to require +ve switching, some seem to require -ve switching and some use a combination of the two?

Is there any chance one of the local 'lectronic gurus (I'm looking at you, John ) might be available at some stage to help me figure this out?

Happy to bring the bike and bits to you or whatever suits...