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Old Streetfighter Motorcycle Forum Post 04-29-2019, 09:54 AM   #1
ants
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Default Older Yamaha regulators

My '89 XJ 600 (51J) reg/rectifier is bust


(the pins on the regulator itself are also corroded so I don't really trust the unit anymore)

My question is - can I get away with the FZR 400 model (as it looks identical)?
https://www.ebay.de/itm/Regulator-Re...387e%7Ciid%3A1

Or do I need to dish out 3x the money for a proper OEM part like this one?
https://www.wemoto.com/bikes/yamaha/...ator_rectifier


(I'll also list two other cheaper ones, if anyone knows if they're a decent fit?)
- https://www.aliexpress.com/item/VOLT...818911260.html
- https://www.amazon.com/REGULATOR-REC.../dp/B01M8EYX1O

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My slow-ass project: '89 Yamaha XJ600 the GOON

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Old Streetfighter Motorcycle Forum Post 04-29-2019, 10:27 AM   #2
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Default Re: Older Yamaha regulators

By and large, a reg rec is a reg rec is a reg rec.

They all accept 3 AC wires as input and output 12v (nominal) DC.

Example: honda used the same regulator on a cbr125 as they did on a cbr900. It was a piece of shit, but they did and until they burnt out, they worked.

Best suggestion if you're Changing the connector anyway, get a modern MOSFET regulator. If funds are tighter, get any regulator with a nice big heatsink and a reputation of reliability (skip honda).

Aaron, living in Gibraltar and riding a 2014 MSX125 (Grom) with a bunch of shiny shite on it. Slow n loud!
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Old Streetfighter Motorcycle Forum Post 04-29-2019, 10:28 AM   #3
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Default Re: Older Yamaha regulators

All that being said, why does the part you've linked only have 4 wires?

Aaron, living in Gibraltar and riding a 2014 MSX125 (Grom) with a bunch of shiny shite on it. Slow n loud!
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Old Streetfighter Motorcycle Forum Post 05-01-2019, 07:44 PM   #4
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Default

Thinking that the base is grounded hence no need for a fifth wire, a quick Google search brought this up

"Shindengen SH629A-12
Notes :
For 3-phase excited field systems.
Terminal Indentification: S1, S2, S3, B+, Grounded Base"

If you were to run a separate ground wire it would greatly benefit you to use a mosfet unit off of say a zx-10. This is what I have put on my 900.

I bought a used low mileage one off eBay and a plug kit from RMStator (I'm not affiliated with them). And it worked out great. Most likely have to reconfigure where it mounts as it is a good deal larger.
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Old Streetfighter Motorcycle Forum Post 05-04-2019, 09:26 AM   #5
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Default Re: Older Yamaha regulators

Upgrade to a newer style r6 regulator, better cooling!

"Practice till the hot brass burns the cheeks of your ass" F. Bob Chow
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