Hey gang. The weathers getting nice and I decided to take my Suzi out for a cruise and remembered the charging problem I was having at the start of winter…
This 75 model runs on an oldschool DC dynamo system where the Starter motor is also the charger. I’ve been fiddeling with it for some time now, and I tested a bunch of components according to the manual. I tested the stator circuits, the armature windings, undercuts are good, good conductivity, all windings are reading about the same resistance. I checked the voltage regulator very thoroughly thinking this was the cause: it all read as operating normally… the power would cut off under about 12.4 volts as it should. I even removed the cap when it was running and you can see as i rev it up the leads jiggeling open and closed properly.
I had a big new everstart wet battery in it for a while…then it died riding home one day and i had to keep it at a high idle the whole time to limp it the rest of the way…so figured screw it and stuck an extra sealed lead acid battery in it…the 12v 20AH ones used in backup systems. I can ride for about 2 hours with this battery now before it starts to give me problems.
So regardless of all this, the bike still lacks electrical power. If i start it up and let it idle all seems normal for a second, then the charge light slowly starts to fade on and all the lights (headlight taillight…even the neutral light) dim. If i give it any gas at all the lights brighten up again and the charge light goes away…then comes right back on when it idles. This has led me to constantly need to rev it at stops out of fear of it dying (i get the feeling people think im trying to be a hotshot revving it so much).
So I’m very confused by all this. The electrical systems perk right up when i rev it, which leads me to believe that the regulator MUST be working correctly right? My train of thought here is: when idle increases voltage increases and closes the regulator gap, charging the battery as well as making the lights brighten up?? or is that a different circuit?
I really just need to know if this is just the battery or something in the charging system. I don’t want to keep burning through batteries because the bikes draining them:(
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