...... just to add one last point, and it is mentioned elsewhere, but the pre wired TM connector I bought from Maplins as a temporary measure to get some form of charge to the battery from my Optimate croc clip adapater, was indeed reverse polarity (red wire was the -ve. I then bought an O7 Optimate connector from Pro Bike UK tried it yesterday and hey presto it was the correct polarity, so happy days, works correctly on both fittings on my bike. I can see owning a Norton is going to be a journey, so thanks to all involved in setting up this Forum, I suspect I will be learning from it longer term!