Stators
Seasoned HDF Member
Joined: Apr 2011
Posts: 6,185
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From: W. Texas
There are usually obvious places for wiring troubles to start at before ripping a harness apart.
First the that came to my mind was a bad ground circuit for the voltage regulator Circuit would include all wiring and connections in that circuit.
WP
Seasoned HDF Member
Joined: Aug 2008
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first off, the hd regulator (and stator) was designed marginal at best to just do the job to save $$$. the regulator grounds to the frame by attachment fasteners but some add another jumper ground. if you lose the ground, the regulator just quits, needs nothing from the outside as it internally senses system voltage. sometimes a bad battery will cause the regulator to go wide open.
in open air, the stator will actually stay cooler than if it is in an oil bath, but if you are running a dry primary with cover, that will change. the varnish on the magnet wire will take way more heat than the engine can produce via the cases. hard to say without seeing the stator.
sounds like a good aftermarket 3ph system would do better.
put an inline amp meter to see what the actual amperage is.
in open air, the stator will actually stay cooler than if it is in an oil bath, but if you are running a dry primary with cover, that will change. the varnish on the magnet wire will take way more heat than the engine can produce via the cases. hard to say without seeing the stator.
sounds like a good aftermarket 3ph system would do better.
put an inline amp meter to see what the actual amperage is.
Elite HDF Member
Joined: Apr 2009
Posts: 3,542
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From: Booming metropolis
got a question about the stator removal. is there a puller needed to remove it or does it slide off and on easy after the compensator is removed. just took the comp off of my dads bike and put back on but was dumb and didnt check. since running an amp he wants to change it out before we head out in spring. want to have the tools needed before taking it apart again.
Road Warrior
Joined: Nov 2007
Posts: 1,428
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From: Belleville Mi.
Trucky911
Seasoned HDF Member
Joined: May 2008
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From: South Carolina
The primitive voltage regulator system just dumps the excess power to ground to maintain proper system voltage.
Stellar HDF Member
Joined: Aug 2020
Posts: 3,179
Likes: 2,223
From: College Station, TX
There are a few things that need clarification. Perhaps I missed it, but what bike are you working on? Touring, Softail, Dyna etc? You mention adding 14 oz of oil to the primary, and then mention open primary. No oil goes in an open primary, so I'm not sure how that goes with this discussion. You might want to describe what you have and include a few pictures as well.
I think your builder is mistaken or there is a misunderstanding on the fluid amount for a closed primary. If the inner and outer primaries are stock the OEM fluid amount recommendation should be followed, less up to a few ounces. The type of oil may be dictated by the clutch material, but the amount the factory recommends is to allow the oil to do it's job. The oil helps carry the heat away from the stator, keeping temperature at a safe operating temp. I believe that much less oil will contribute to a failed stator, over time. And I believe it would likely to contribute premature wear on the compensator and inner primary bearing too as the same oil lubricates those parts.
Paul
I think your builder is mistaken or there is a misunderstanding on the fluid amount for a closed primary. If the inner and outer primaries are stock the OEM fluid amount recommendation should be followed, less up to a few ounces. The type of oil may be dictated by the clutch material, but the amount the factory recommends is to allow the oil to do it's job. The oil helps carry the heat away from the stator, keeping temperature at a safe operating temp. I believe that much less oil will contribute to a failed stator, over time. And I believe it would likely to contribute premature wear on the compensator and inner primary bearing too as the same oil lubricates those parts.
Paul
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