EVO All Evo Model Discussion

Voltage regulator keeps coming unplugged

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Old May 10, 2026 | 11:00 PM
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Default Voltage regulator keeps coming unplugged

1994 Fat Boy.

As the title says, it keeps coming unplugged. I even trimmed some of the rubber off of the stator plug to make a stronger connection, but it's super easy to unplug. It's like it's not gripping in there properly.

Any of you ever dealt with this?
 

Last edited by Windseeker; May 10, 2026 at 11:24 PM.
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Old May 11, 2026 | 05:25 AM
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Google search “Harley Evo stator plug retainer”, there’s several different kinds.
 
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Old May 11, 2026 | 05:30 AM
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45095-85 You'll need to source it from aftermarket.
 
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Old May 11, 2026 | 05:30 AM
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This clip is standard on earlier bikes, it may be missing from yours:



 
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Old May 11, 2026 | 05:41 AM
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Yes, kind of a bad design. Companies even came up with a "stator plug retainer arm" to help deal with it. Google search will give you a few different versions of the retainer arm. I made my own so it only added 4 or 5 horsepower.

Ended up directly wiring the stator wires to the voltage regulator via splicing (cut, crimp, solder, adhesive lined heat shrink) when my 1 year old stator started leaking at the rubber grommet/connector at the block. Filled the hole with "right stuff" black gasket maker and problem solved. Not a single issue since, Pretty sure I used 10 gauge wire for hard wire connections. If I ever have to replace the regulator, I will install a deutsch connector. If I need to replace the stator, then I will crimp, solder, adhesive heat shrink again from inside the primary.

Connections made in hole of the block using the adhesive lined type of heat shrink
Connections made in hole of the block using the adhesive lined type of heat shrink

Hole in block filled with
Hole in block filled with "right stuff" black and used part of old stator plug to give it a finished look.

 
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Old May 11, 2026 | 06:42 AM
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Originally Posted by Joe12RK
This clip is standard on earlier bikes, it may be missing from yours:


A guy could fab one up on the workbench in 5 minutes.
 
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Old May 11, 2026 | 06:57 AM
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I have the flip-down type (and yes, my bike needs a cleaning), and it never really seemed to do very much.




So where would the clip show above go?
 
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Old May 11, 2026 | 06:57 AM
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Old May 11, 2026 | 07:08 AM
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This is mine, captures and holds down tight.

 
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Old May 11, 2026 | 07:12 AM
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Originally Posted by Schex
This is mine, captures and holds down tight.
Mine is like a wet noodle. I mean, it's firmly mounted on the bike but doesn't exert any real downward pressure.
 
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