You have convinced me.
Thks guys.

Hi There,
The regulator is a no name brand supplied by Wassel Motorcycles.
It was many years ago and I see that this model WW 10208 does not exist anymore in their parts list. You can buy something that looks very similar with the model no. MCR2 37097. Feked Ltd sell a Lucas one for a whopping £84 ...

So, here is the state of play, which is giving me sleepless night !!
With the engine running and revs high, the voltage across the battery does not go above 6 volts. Furthermore, the lights do not brighten either.
I have once again tested the dyno, by bridging out the terminals and measuring the ...

HI Mick,
The negative side of things seem to be as per what you say.
I just cannot seem to get the needle into the positive.
I have installed a new battery, so maybe a big deflection to the right is not going to happen. I did read that if the lights brighten when the engine is revved, then all is ...

Hi All,
Well the dyno is now producing a good voltage, but the ammeter does not go into the +ve.
I now suspect the ammeter itself. The wiring seems to be OK.
How can you check it? Can I somehow put a 6v power supply to it, to see if the needle moves as it should?
If it were not seeing a charging ...

Thks for the help guys.
I have purchased new brushes and will check the earthing again.
I will also attempt to motor the dyno and flash it.
Chrs
Bruce

Hi Chris
This is why I became a mechanical engineer !!
If I put one lead of the multimeter directly on to commutator, I get 0,3 ohms.
If I put the lead on the alloy body, and ensure a good contact, I can get up to 19 ohms !! It seems to vary. Is this because the resistance measurement has to go thru ...

Hi Chris,
So after giving the unit a good clean, it was indeed caked in crap and oil due to a old faulty oil seal, I conducted your resistance check.
The upper measurement was 2,5 ohms but I could not get a resistance figure at all from the lower.
I have attached a pic of how I have connected the ...

Hi Guys,
Despite all of my best efforts, the problem still exists.
I have now embarked on a journey to remove the dynamo and have got to a point of some concern.
Having removed all sprockets, plates and bolts, how do I get the whole assembly out of the engine. Do I need to remove anything else. eg ...

I now realise that you are able to "Flash" the Dyno. This will be my first port of call. Seems like a simple task as long as I can get the chrome end cover off the unit. I have tried that already without success, but maybe it needs some KY jelly and a waggle !!!
My bike is fitted with a Watsonian ...