Would my 1951 ES2, (plunger frame) have been positive earth or negative ?
And can a modern 6v voltage regulator be suitable to use ? are they polarity sensitive ?
From pre-war to 1956 the manuals that I have show negative earth, although I don't have one for 1951. The first emergence of positive earth that I can find is 1957. Hope this helps.
Which I like as it's consistent with modern vehicles. I get easily confused.....
WRT regulators, they are polarity conscious: some can be changed over, with others you have to buy the right polarity to start with. Modern solid state ones (especially the ones sold by Mr Osborn on here) are pretty reliable although I have successfully reconditioned the old RB108 on my ES2.
Thank for your help, how do I get hold of Mr Osborn ?
Firstly the modern electronic regulator I sell is VERY reliable. All units we sell can be 6V or 12V. The polarity cannot be changed after you purchase it. ie the dynamo can change polarity very easily, the bike (provided there is no real electronics on it ie electronic ignition or an electronic regulator) can work with either polarity, BUt if you change the polarity but do not concern yourself with wiring colours then you WILL get confused in future and you will end up in smoke.
My web site explains this point in detail. By the way Ian I do not know of any electronic regulator that can be changed with regard to its polarity. Mechanical regulator do not care about polarity.
Yes, I'm sure you're right about that. Slip of the mind.....
So I need a 6v dynamo regulator Neg earth and a 6v battery?? Anything else ?
Are LED bulbs available that will fit the original bulb holders front and back ?
There is some threads on LED bulbs here. I suggest a search on this site. Rear LED no problem. Front no problem to find a fitting one, but most (if not all) have a poor light pattern.
Paul Goff, http://www.norbsa02.freeuk.com/ has a good selection.
The attached wiring diagram may help.