Looking at the receipts that came with it, suggests that it's fitted with an Electronic +ve Voltage Regulator from Draganfly part no. A28-92 although I have yet to confirm that.
I have charged the battery and re-connected it with +ve earth. All lights work except Speedo lamp and the horn is not working properly but I think I can sort that out easily enough. Ammeter shows discharge with lights on.
I will check out the Dynamo next and I have one or two bad electrical connections to remake. Other than that it seems pretty good.