Have a honda gx200 style motor on a rb200 frame with electric start. Having trouble keeping the battery charged. Using dual coils with a regulator/rectifier.it only is producing around 5 volts and is useless to charge the battery enough to maintain the battery after starting. Any ideas??
You probably have half wave DC lighting coils, not charging coils.
Testing with a multimeter between the 2 coil out lines without the rectifier/regulator connected would tell you for sure. A typical coil pair with half wave bridge rectifier chip is usually between 3A and 10A, with a 12v peak dcv if they are for lights only, somewhere between 13.5 and 14.5 if they are for charging, and if they are not running a bridge chip the dcv setting wont read but acv will.
If there is a chip as I suspect, hooking them to a rectifier is:
1. Pointless because it's already DC
2. The reason you have uselessly low voltage.
My set up is a custom wound pseudo 3phase using 18awg and requires external rectification and regulation... if I disconnect my reg/rec I make 220 V~ just above idle, and I don't really want to know what it would peak, I kinda smell burnt hair just thinking about it.
I get a nice peak of 14.5Vdc just above idle (12.5 at idle) with the Suzuki 3 input rectifier