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Replace a rectifier on an old honda CB? - Motorcycles

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  • William Miller
    William Miller Dec 12, 2012

    Stupid FixYa... my pictures didn't come through.



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  • Motorcycles Master
  • 9,098 Answers

Thanks for the video!I would expect you to have gotten a detailed instruction sheet, unless maybe this is not a correct replacement part.

The distributor should be able to help you I would think. You may consider returning it if they won't or if you find out it's not the right part for you.

I did a non-OEM replacement & upgrade on a 1972 Honda CB350K3, and I used a full-wave bridge rectifier that I bought at my local Radio Shack.

You can get one like the NTE53016 (200V 40A) for under $5 via Radio Shack here.

You would ideally need to refer to the wiring diagram in your bike's service manual to be sure you get it connected correctly.
GENERALLY, but not always, positive is red, and negative is black.
One easy way to find ground is by measuring between the wire under test and the frame or negative lead of the battery.

You may have to cut wires, and either solder it in directly or attach new connectors.

Any full-wave bridge rectifier has two AC inputs, which are interchangeable with each other. They go to your generator's output.

And you will have a positive output and a negative output, usually at opposite corners from each other.

Here is a schematic for a bridge rectifier:

Replace a rectifier on an old honda CB? - httpstatic.electrotechonline.comimgcache111583523.jpg
The bridge will be marked, and typically the positive and negative are on opposite corners, and the other two corners are the AC inputs:


square_bridge_rectifier.jpg
Let us know if you need more help.



12_12_2012_12_59_08_am.jpg

Posted on Dec 12, 2012

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