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some dude from Oakland, CA United States
this is a HALF wave rectifier, meaning you get HALF of whatever AC goes in. in my case i got about 4volts dc output at idle. if you are like me, you probably want a FULL wave rectifier, in which case get the one with fins on the side, or pony up and get a trailtech. also, don't forget to float the AC light coil(no ground wire).
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My go to cheap reg/rec unit
June 4, 2015
taco eater :
Graham Motzing from Austin, TX United States
It looks like there are two different versions of these, from what I can tell, but all the ones I have used (typically bare aluminum with no side fins) have AC on the diagonal poles. Looking at the connector with the tab on top, the lower left and upper right corners are AC floated from your coil.
The upper left and lower right are DC.
These units are real nice, they regulate at 13ish volts and rectifty to DC. You can frame ground off the DC or the AC or both. If you frame ground the AC they work half wave and if you float the AC they work full wave.
You can also use spade terminals to hook up to them, i've never found a source to buy the connector by itself, but I've never looked real hard.
This diagram shows it in 'half wave' mode: http://i397.photobucket.com/albums/pp60/LynnEdwards_photo/Regulator1small.jpg
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Half-wave r/r for 50-110cc GY6
September 12, 2014
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Maci Dub from Dubvue, WA United States
The box this r/r came in has a sticker that said www.idcusa.net 633779. If You go there and type in the part # you get this: http://get2itparts.com/index.php?main_page=product_info&cPath=85_102600&products_id=633779
50-110cc half-wave rec, intended for bikes with center-tap coil, AC lighting, and DC to charge the battery for the starter. Pin 4 has continuity to the heat-sink casing (not designed for floating ground). If You want full-wave with a floating ground get a better r/r, like the 125cc+ one with the fins on the sides: http://get2itparts.com/index.php?main_page=product_info&cPath=85_102600&products_id=634626
More infos: http://mastercircuits.blogspot.com/2011/06/half-wave-stator-to-full-wave.html
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DOA
March 18, 2013
taco eater :
Anonymous Person from Hamilton, ON Canada
This one died when I tried using it, but I got a similar regulator at my local shop.
For the wiring diagram, look to this post for the GY6 regulator... http://buggynews.com/blew-another-gy6-regulator-rectifier-t19227.html Took me a while to figure it out, but it does the job when you get it right.
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Different now?
December 8, 2012
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Evan Drew from Las Vegas, NV United States
The one I got isn't wired the same as Jake's, it doesn't use a floating ground. It didn't have fins on the sides either, so I guess it's not as heavy duty? Anyways, here's how you wire it: http://i824.photobucket.com/albums/zz168/usernameunavailable1/IMAG0366.jpg You don't need to use a battery, you can use a big capacitor instead, just make sure it's rated for 16v or more.
no bueno 
My go to cheap reg/rec unit 
Half-wave r/r for 50-110cc GY6