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KZ750 Twin Regulator/Rectifier relocation
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KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 11:40 #871925

  • ShaneDude
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Im about to install a new battery and reg/rec in my 77 KZ750B. Im not happy with the stock position of the reg/rec. There is not a lot of airflow under the massive sidecover.

Any idea on where I might relocate it to?

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KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 12:34 #871927

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I would relocate the reg/rec unit under the battery tray.

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KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 12:47 #871929

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Im thinking something more like the triumphs which have them up front. near the forks.

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KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 14:13 #871931

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Trust me, you don´t need more air flow on your reg/rec like a ram air system for carbs! Do not made any rocket science here!!!
Your alternator power out put is less than a half of a modern bike!

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Last edit: by Scirocco.

KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 15:16 #871934

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If you are so determined....,,,.and am only mentioned what I did as an idea.  .......I installed a SH775 under the rear fender, but this was a 750-4, not a twin.     I do know where to get,...and how to make,,, 'factory' electrical connectors.         The SH775 was much bigger than stock....and got the idea from a Yamaha FZ-09 which also have it under the fender.

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KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 15:54 #871937

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If your new RR is a MOSFET ( transistorised unit) then they run much cooler than the old diode units and cooling is less of an issue. Just make sure wherever you put it that it is bolted to a heat sink and you should be fine

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KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 17:43 #871944

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Correct me if I'm wrong, but doesn't the '77 750 Twin use a field coil in it's charging system?  Assuming yes, doesn't it use a special R/R (or separate regulator and rectifier?)

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KZ750 Twin Regulator/Rectifier relocation 09 Aug 2022 18:36 #871946

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As allways, a picture of the charging system would be very helpful to clarify the charging inviroment.

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KZ750 Twin Regulator/Rectifier relocation 10 Aug 2022 07:02 #871969

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The parts diagram at Partzilla shows two charging systems for the 1977 750 B2. I guess a change was made during that model run. If so, identifying which system is on the bike in question seems paramount to resolving the issue.

www.partzilla.com/catalog/kawasaki/motor...erator-starter-motor

One system has a unified RR, while the other uses separate components.

www.partzilla.com/catalog/kawasaki/motor...-regulator-rectifier
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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Last edit: by TexasKZ.

KZ750 Twin Regulator/Rectifier relocation 10 Aug 2022 09:27 #871979

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i instaaled it today. didnt need the hassle and decided not to relocate it.

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