Vic, on Vincent twins the dynamo runs at 1.25 time the engine speed. With the poly-vee belt ratio those twins run the Walkernator at twice engine speed on 'B' and 'C' twins, slightly faster than that on 'D' twins and less than that on Comets. With the earlier 30 amp alternators the load of 130 watt headlamp bulb, fore and aft 21 watt indicator bulbs, 6 watt rear light and 21 watt brake light are all balanced at 2,000 engine rpm on my twin. At tick over, about 1,000 rpm on my bike, that load is almost balanced. On Dick Sherwin's twin a lower powered head lamp bulb, all the other lights and heated clothing are also balanced at about the same revs. Basically, one never sees a negative amperage. At one stage, and just for test purposes, Dick ran three 60 watt headlamps plus rear lights etc, all with no negative amps showing. It really does not matter to me whether anyone likes the appearance or not. Over 80 of these kits have been sold to UK riders, nearly all of them long distance riders who have covered several tens of thousands of miles with the kit. If you want to ride in winter, have a pillion passenger who would like to have heated clothing or a sidecar with extra lights and a passenger in that who would like to have heated clothing then, as far as I know, there is nothing else available for our bikes which will provide the current required.