Some have scoffed at the generator light bulb being a culprit in the flat battery syndrome, others have suggested that as the light goes out when revs increase..assuming all normal..I must be delusional. Others say that it is outrageous to expect the whole charging system to be dependant on one small dash bulb. What stupid company would do that to its bikes...
Well sceptics its true. Although you wont find reference to it in your haynes or clymers, the genereator bulb acts as the exciter for the alternator. This means that the battery will not charge if the filament is broken.
Above 4000rpm the alternator will self excite and the battery will charge, but as you can imagine keeping a BM flat twin above 4000 is not how its ridden generally.
Thanks to BM cycles in Melbourne for the explanation, although it still feels like gobledy gook to me.
Maybe Frank can explain it!
__________________
Close to Antarctica and a long way from reality
|