Thank you both for the replies. I have certainly learnt a bit more about motorcycle electrics !
I shall work out the resistance as best I can and then get a modern one to put in its place. There seems to be many different types and sizes of resistor out there, I assume it matters what type I use, I’m guessing one of those little things that looks like a blob of glue with a wire sticking out of each side may not be suitable ?
Can you give me any guidance ? There is a maplins near where I live, I can ask them what they have.
Mark.
