Regulators, Stators, Rotor Compatibility
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Grand HDF Member
Joined: Sep 2022
Posts: 4,470
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From: Florida
Regulators, Stators, Rotor Compatibility
All custom…not interested in a “must be stock” debate. Very interested in reliable advice.
I need a straight answer. I’m getting several differing opinions from reliable sources.
Need a yes or no not a lecture on best practices.
Can I run a 32 amp rotor and stator packaged by supplier with a 38 amp regulator?
I have an adaptor made up to connect the deutch connector from the 38 amp regulator to the 2 pin 32 amp stator connector.
This is custom. If you’re a purist and don’t want the harness cut, the ONLY WAY is to splice the 32 stator/rotor to the 38 reg using the adaptor… if it can’t be done the only option is to gut all original regulator and harness related and re-wire for a 32 amp. I CANNOT install a 38 rotor stator in the motor, not an option.
I think I can personally. The regs job is just to convert AC to DC voltages so what the battery gets is in the proper range.. a 38amp reg should send no different to the battery for charging. It just means it was rated to convert even more amperage. But I’m very weak with electrical.
I need a straight answer. I’m getting several differing opinions from reliable sources.
Need a yes or no not a lecture on best practices.
Can I run a 32 amp rotor and stator packaged by supplier with a 38 amp regulator?
I have an adaptor made up to connect the deutch connector from the 38 amp regulator to the 2 pin 32 amp stator connector.
This is custom. If you’re a purist and don’t want the harness cut, the ONLY WAY is to splice the 32 stator/rotor to the 38 reg using the adaptor… if it can’t be done the only option is to gut all original regulator and harness related and re-wire for a 32 amp. I CANNOT install a 38 rotor stator in the motor, not an option.
I think I can personally. The regs job is just to convert AC to DC voltages so what the battery gets is in the proper range.. a 38amp reg should send no different to the battery for charging. It just means it was rated to convert even more amperage. But I’m very weak with electrical.
Last edited by Rains2much; Sep 14, 2024 at 01:59 PM.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,921
Likes: 8,027
From: poway
Well IMO, it's not problem.. The amperage rating on the regulator typically means that the regulator can handle 38 amps.. If the alternator only puts out 32, the regulator is running at 84% of what it's capable of. Remember post early shovel, alternators run outputting max current and the regulator controls the current/voltage.
Now if you were running a generator, I'd worry about using a higher current regulator as the regulator tells the generator how much current to putout.
My FXR runs a 2002 bagger charging system, with a 32 amp rotor no issues. IIRC the only difference between the 32 and 38 alternators on TCs was the rotor and the regulator The stator was the same.
Now if you were running a generator, I'd worry about using a higher current regulator as the regulator tells the generator how much current to putout.
My FXR runs a 2002 bagger charging system, with a 32 amp rotor no issues. IIRC the only difference between the 32 and 38 alternators on TCs was the rotor and the regulator The stator was the same.
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