02-01-2020, 07:33 PM
Firstly I would say that a steady charge rate must be no more than 8 amps if you wish the dynamo to survive. To reduce the charge rate the third brush must be moved away from the main brush, so that when the engine is at high revs the charge rate does not exceed 8 amps. It may well be that with LEDs all round 6 amps will be enough to balance the full lighting load, so reducing to this figure would be a good idea for long dynamo life. You should be able to identify the third brush, because it is the only one whose position is adjustable in relation to the others. Incidentally where are you in Cambs? I am at Cottenham, just North of Cambridge. If you send a private message with phone no I will give you a call.
Robert Leigh
Robert Leigh