Bonnie Rectifier/Regulator to borrow?

[Martin Richard]

I know it's a long shot, but by any chance does anybody have a functioning rectifier/regulator for an air cooled (preferably non-EFI) Bonneville that I could borrow? I'm having charging issues and I'd like to swap in a "known good" rectifier to see if that may be the issue. Thanks in advance!

[Jim Baker]

Since we're asking these questions, if anyone has a spare working stator from a SOHC CB750, hit me up ;) 

On Mon, Apr 4, 2022 at 12:49 PM Martin Richard <martina...@gmail.com> wrote:

I know it's a long shot, but by any chance does anybody have a functioning rectifier/regulator for an air cooled (preferably non-EFI) Bonneville that I could borrow? I'm having charging issues and I'd like to swap in a "known good" rectifier to see if that may be the issue. Thanks in advance!

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[Jake Lehner]

@martin how is the R/R behaving? On my speedmaster (non-ego) I was having charging issues. Found the R/R was putting out low voltage at idle. 

Replaced it with a Rick’s MOSFET R/R and all was well with the world. 

Might be worth just going for the replacement Ricks. It’s a better product over OEM anyway. 

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[Martin Richard]

Jake:  I haven't pulled anything out yet but I did measure the charge at idle and it is only 12.8v.  Even when I rev the engine it stays at 12.8v.  

On our long ride yesterday battery was dead after lunch.  We got it bump started and I rode home, 80 miles at 70+ MPH and the battery was, again, dead when I got home.  That's when I put the voltmeter on it and discovered it was only showing 12.8v.  

From what I've seen on the Intertoobz, this is a classic symptom of a failing rectifier/regulator.  

I just wanted to know if maybe somebody had upgraded their R/R and had a spare one laying around I could swap in.  It's not a terribly expensive part ($129) but not dirt cheap either.  I figured if somebody had a good one I could swap it in and see if that fixed the problem.  

Martin

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[Martin Richard]

Having said the above, my inclination is to just go ahead and replace the R/R anyway.  Given that my bike is 20 years old, it's probably seen better days.  

On Mon, Apr 4, 2022 at 2:23 PM Jake Lehner <jakel...@gmail.com> wrote:

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[Norman Wright]

You might consider taking the battery to an auto store and have them test with load.  How old is the battery?  I've usually found it's the battery, not the charging system.

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[Jake Lehner]

Definitely sounds like classic R/R issues. 

I have two OEMs from speedmasters but I think they’re both in Atlanta. I’ll check. 

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