hi all, i took a look at the wiring diagram in the Technical info page and it states NEGATIVE EARTH for this diagram, would this be correct for a 1940 m20?
as i thought most older bikes were POSITIVE EARTH.
thanks barry

email (option): mrsbfuller@hotmail.co.uk

-ve earth for your bike Barry, although you could wire it anyway you want providing your dynamo is polarised correctly

It seems +ve earth became common in the 50's & 60's, reduced corrosion effect they reckoned

I had thought like you this had been the case too

Job

email (option): Jonnyob1@googlemail.com

hi john, should most dynos be neg earth, will it be the same as for the regulator
barry

email (option): mrsbfuller@hotmail.co.uk

The dynamo can be pos or neg earth. I think there is instructions on the technical page on how to polarize your dynamo. Ron

email (option): ronpier@talk21.com

On the tech page there are instructions some place, if not I have them somewhere

The dynamo can be polarised and the std regulator can operate in either format

Be careful if you go the electronic regulator route, then you are committed to -ve or +ve earth

Expensive if you get it wrong !!

Job

email (option): Jonnyob1@googlemail.com

ok thanks ron, i need to get a dyno first let alone other parts i need. i went to russell motors last week and got a few bits, very nice place and very helpful people, so recommended.
barry

email (option): mrsbfuller@hotmail.co.uk