Beezer is back in the shed. i've dismantled the dynamo to do other tests. now when i connect the dyn as a engine with a 6 v power supply , that's running, it seems the problem comes from the regulator. in the same time i've found a crack on the exhaust tube, located between 2 brackets, strange, repaired but strange. weather's not cool to work metal, i 've started the stove but now there's a f****** condensation everywhere, look at the crankcase.