classic motorcycle forum

Thanks very much L.A.B.
Of course the coil will need swapping anyway and these days they are usually marked + and - rather than CB and SW as they used to be.
I realise the ammeter wires will need swapping over too if changing earth polarity. I have in the past changed earth polarity on many cars with dynamos, but never a motorbike with a permanent magnet alternator with lighting switch controlled output.
The only reason for considering -ve earth is to permit easier wiring of led lights in order to ease the load on limited alternator output so that a more powerful headlamp bulb may be fitted.
I very much appreciate your reply. You have helped me out before. But not recently because a year of mishaps, starting with a stroke and culminating in seven broken ribs caused by driving into the side of a car which tried to execute an un-signalled "U" turn as I was overtaking it. Severely curtailing my motorcycle activities and also visits to the forum.
A  lesson learned there! Fluorescent jackets seem to be invisible to some people!
Jim.

Nice lesson learned even I have faced similar problem earlier and I learnt similar lesson:)