Voltage Regulator point gap. V-Twin 6v

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Voltage Regulator point gap. V-Twin 6v

Postby jOe » Mon Nov 22, 2021 5:21 pm

V-Twin 6 volt regulator (-47). Does anyone know what the point gap settings are?
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Re: Voltage Regulator point gap. V-Twin 6v

Postby JerrryR » Mon Nov 22, 2021 5:53 pm

Here is the HD service Bulletin about the regulators adjustments. I can only post 3 pictures so I will follow this post with one more Service Bulletin page and several that I think are important as to your question from the Delco Remy Bulletin. If anyone wants me to post the remaining 7 or 8 pages from the Delco literature let me know otherwise I will just do these.

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Re: Voltage Regulator point gap. V-Twin 6v

Postby JerrryR » Mon Nov 22, 2021 5:58 pm

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Re: Voltage Regulator point gap. V-Twin 6v

Postby JerrryR » Mon Nov 22, 2021 6:00 pm

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Re: Voltage Regulator point gap. V-Twin 6v

Postby hennesse » Mon Nov 22, 2021 6:37 pm

Hey Jerry - all those documents can be found on the Technical : Regulators page.
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Re: Voltage Regulator point gap. V-Twin 6v

Postby JerrryR » Mon Nov 22, 2021 7:43 pm

Thanks Dave, I couldn't remember if you had posted it or not. Is it a good copy or the one with torn pages? I think I have a better copy if the one we have is bad.
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Re: Voltage Regulator point gap. V-Twin 6v

Postby jOe » Mon Nov 22, 2021 7:55 pm

Excellent info, but I’m looking for the point gaps on the V-Twin replacement unit. Different from the OEM unit
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Re: Voltage Regulator point gap. V-Twin 6v

Postby hennesse » Tue Nov 23, 2021 11:35 am

jOe wrote:V-Twin 6 volt regulator (-47). Does anyone know what the point gap settings are?


jOe - regulators are set by electrical performance, not by static point measurements. Whether it's a Delco-Remy, or a V-Twin Taiwan special, manufacturing variations (new) and wear (used) affect the electrical performance.

The application determines the desired electrical performance. On a 1964 XLH, the cutout relay unit should be adjusted to close at 6.4 volts. On a 1964 XLCH, the cutout relay unit should be adjusted to close at 5.5 volts. Why? The XLCH, with no battery, would have no lights until the RPM increased to mid-speed if set to the XLH setting. I believe that the XLH regulator (74510-47A D-R 1118995) and the XLCH regulator (74510-59 D-R 1118989) are the same thing - just adjusted differently.

V-Twin sells two different regulators as replacements for the 74510-47A. The ones I've seen both have two resistors on the back just like the D-R 1118995 and 1118989s (see the ID photos on the Technical : Regulators article). Are they both the same? Did the Taiwanese factory set them accurately at the factory? Is yours used? Is yours having problems?

The procedure for properly checking and setting for Ks and Sportsters thru 1969 are given in D-R bulletin 1R-116 - under Two Unit Regulator Checks and Adjustments (Technical : Regulators article). These require special equipment usually found today only in shops which rebuild automotive electrical equipment like generators, starters and alternators. Please note that the illustrations for the two-unit procedures show a 3-unit regulator!

While D-R does give a point gap for the cutout relay unit, that is just an initial setting - you must then adjust the cutout relay unit to the specified "closing voltage" for your application. They do not give a point gap for the voltage regulator unit. You must set the voltage regulator unit to the specified "voltage range" or "voltage setting adjust" for your application.

So there just isn't a magical point gap that will make the regulator work properly for your application. While the V-Twin units should work fine for K-models and XLHs, they won't work properly in an XLCH, unless adjusted to the XLCH specs. And if yours seems to be having problems, there's no easy way to test without test equipment.
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Re: Voltage Regulator point gap. V-Twin 6v

Postby jOe » Tue Nov 23, 2021 1:42 pm

Thanks.
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