I've got a Sunl 110cc that came to me not running with a brand new shotgun package of electrical parts including the stator and voltage regulator/rectifier. I finally overcame the no start issue and fixed the broke-when-new kill switch issues, but now I'm not getting any charging. I believe my stator is good because I get about 10 vac on the white wire to ground and about 9 vac on the yellow wire to ground. It has a generic 4 pin regulator which I think is the problem. I figure I should have about 19vac going into the rectifier and maybe 16vdc coming out. I get nothing. I only get battery voltage. I'm pretty certain its either a bad rectifier or an incompatable rectifier. I searched for a schematic of the rectifier/regulator and found this video: If his schematic is right, this regulator would never work with my stator. I think this is how my rectifier (and I bought a second one which has the same result) appears to be made. I get a good diode reading from the upper left pin to the bottom left pin. I get no other diode reading regardless of the pin combinations I try with the meter in diode test mode. I don't even see how a circuit is completed with the way the regulator is wired.

Can someone make a recommendation for a voltage regulator/rectifier that works with the yellow and white Chinese generic stator? I've got a 25A bridge I'm going to probably wire in tonight and see what kind of VDC it gives me. I might go that route if I can find a regulator. Any idea if this regulator would work?
Any thoughts/suggestions would be appreciated.

 

Jacked did you ever figure out the problem. I am facing the same exact issure. Voltage out of the stator and battery voltage out of the rectifier. Tried an Amazon rectifier still nothing. I even tried a diffent stator out of desperation.

 

I know little about electronics but those "regulators" were never meant to regulate, they are rectifiers. So will allow almost all of the feeble output from the stator windings to get to the battery. All you need to know is if the voltage in the battery is rising, with engine running (lights off if fitted).

There have been problems with some makes, circa 2019, as some high output stators were fitted at the factory and this resulted in overcharging batteries. Even with the feeble alternators, you can get over 15v at the battery if the battery was fully charged to start with, and the bike is run for quite a while after the starter has taken it's power out.