Hey guys, Trying to get my 1975 A100 sorted before taking it for its inspection. All seems well except for the electrical side of things. The headlight is very very dim only when the engine is running and off when the engine is off. From what I can tell from the wiring schematic of an earlier model (http://smokeriders.com/diagrams/Suzuki/Singles/A-100A_dis.gif) there are 3 coils: one provides current for the spark plug, one goes through a rectifier (and presumably the rectifier has some sort of regulator built in) to charge the battery, do the signal lights and do the instrument lights, and the final coil powers the headlight (and has a regulator). Well, I took the regulator out to look at (and forgot I had taken it out) and started the bike. The headlight lit up fully! This makes me believe that the regulator is busted. At this point I had not found the schematic yet and I assumed that the regulator was a simple zener shunt across the headlight, so I ordered a new 50W 6.2V zener (still not here). That was me making the assumption that the regulator came after a rectifier. Now looking at the diagram, it seems like the headlights must be A/C since I see nowhere where the current is rectified before going to the headlight (the rectifier is on the other circuit) This would imply that the regulator must be an A/C voltage regulator instead of a simple zener (perhaps it is 2 zeners in series but facing different directions - it still just must be a shunt to ground though as there are only 2 wires and 1 goes to ground). Is anyone familiar with this system who might have some ideas? I'm not entirely familiar with how the magneto works - will running the bike without the regulator burn out the headlight and if so does anyone know what is actually in that regulator? I saw a schematic for the similar ax100 here: http://www.cmelectronica.com.ar/wiring-diagram/imagenes/suzuki-ax100.jpg and it has no regulator - but the current for the headlight seems to come from the half point of the coil which I suppose would make it less. Thanks!