Cable Throttle => Throttle by Wire
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Stellar HDF Member
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From: Unreconstructed
Cable Throttle => Throttle by Wire
I originally posted this in the Dyna section where I live but thought I'd get more eyes out here. I don't want a debate which is better or questions about why I'm "stupid" so you guys can save your hateraid for someone else.
I have RA everywhere, but I am very blessed to be almost completely controlled with meds; however, the times that my shoulder, elbow, wrist, hand, whatever could use a quick break are happening more frequently while I ride. While having a beer in the shop and admiring the bike last night I got to thinking about throttle by wire again. I pulled out the parts book and the shop manual while I sipped and listened to Ella Langley and here's what I found.
By way of simple comparison, a 2017 FXDLS has different numbers for the following parts:
I have RA everywhere, but I am very blessed to be almost completely controlled with meds; however, the times that my shoulder, elbow, wrist, hand, whatever could use a quick break are happening more frequently while I ride. While having a beer in the shop and admiring the bike last night I got to thinking about throttle by wire again. I pulled out the parts book and the shop manual while I sipped and listened to Ella Langley and here's what I found.
By way of simple comparison, a 2017 FXDLS has different numbers for the following parts:
- ECM 41000057 | $700
- Wiring harness 39201569A | $400
- Throttle control 32700050 and tube 65100075 | $165
- Left lower switch housing (cruise control) 71500282 and switch 71500290 | $100
- Induction module 22200002 (I'll need an alternative since I'm running an HPI 58/62 setup)
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Stellar HDF Member
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From: Unreconstructed
^^^ That read "what's the question" ^^^
UM, I see 2.
From what I can tell, the ECM has 3 ports instead of 2, the third takes the feed from the throttle control and feeds it back to the induction module and done. Can it be that simple? I do not see any additional speed sensors beyond what my FXDB has, not counting the ABS sensors. Does anyone have any REAL knowledge on the topic?
UM, I see 2.
From what I can tell, the ECM has 3 ports instead of 2, the third takes the feed from the throttle control and feeds it back to the induction module and done. Can it be that simple? I do not see any additional speed sensors beyond what my FXDB has, not counting the ABS sensors. Does anyone have any REAL knowledge on the topic?
Last edited by snake_eyes; Apr 30, 2026 at 10:22 AM.
Just a few thoughts - what about a cramp buster, a throttle lock, or lessening the spring force on the throttle body return spring. seems like it would be a much easier endeavor. I have used them on a few bikes.
https://www.crampbuster.com/
https://www.crampbuster.com/
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Stellar HDF Member
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From: Unreconstructed
Just a few thoughts - what about a cramp buster, a throttle lock, or lessening the spring force on the throttle body return spring. seems like it would be a much easier endeavor. I have used them on a few bikes.
https://www.crampbuster.com/
https://www.crampbuster.com/
I did find an answer to my question, and its yes. The harness and ECM need to be swapped and a few odds and ends added but it is entirely possible to do and would not be difficult. I estimate that it'd cost around 2k with me doing all the labor.
Grand HDF Member
Joined: Nov 2012
Posts: 4,997
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From: Newport,TN area
I didn't see the brake switches in your list. Perhaps they are part of
the "odds and ends" you are referring to ? Or does yours already have those ?
Looking at RonniesHD microfiche, it looks like you may need the switch modules and housings.
So when you tap the front or rear brake levers, the Cruise Control should disengage.
I looked at a conversion for my 2013 FLS Slim to the 2017 FLSS ECM/throttle/et-al, but
like you said, it was about ~$2K or more cost. The one thing I did not know if it would
work is to put my 2013 VIN into the 2017 ECM since I have an HD combo speedo/tach.
I am guessing it would show "VIN-ERR" and not work...
Thanks for any clarification,
T.
the "odds and ends" you are referring to ? Or does yours already have those ?
Looking at RonniesHD microfiche, it looks like you may need the switch modules and housings.
So when you tap the front or rear brake levers, the Cruise Control should disengage.
I looked at a conversion for my 2013 FLS Slim to the 2017 FLSS ECM/throttle/et-al, but
like you said, it was about ~$2K or more cost. The one thing I did not know if it would
work is to put my 2013 VIN into the 2017 ECM since I have an HD combo speedo/tach.
I am guessing it would show "VIN-ERR" and not work...
Thanks for any clarification,
T.
Last edited by WKNDS; May 7, 2026 at 07:26 AM.
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Thread Starter
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Stellar HDF Member
Joined: Aug 2019
Posts: 3,130
Likes: 1,917
From: Unreconstructed
I didn't see the brake switches in your list. Perhaps they are part of
the "odds and ends" you are referring to ? Or does yours already have those ?
Looking at RonniesHD microfiche, it looks like you may need the switch modules and housings.
So when you tap the front or rear brake levers, the Cruise Control should disengage.
I looked at a conversion for my 2013 FLS Slim to the 2017 FLSS ECM/throttle/et-al, but
like you said, it was about ~$2K or more cost. The one thing I did not know if it would
work is to put my 2013 VIN into the 2017 ECM since I have an HD combo speedo/tach.
I am guessing it would show "VIN-ERR" and not work...
Thanks for any clarification,
T.
the "odds and ends" you are referring to ? Or does yours already have those ?
Looking at RonniesHD microfiche, it looks like you may need the switch modules and housings.
So when you tap the front or rear brake levers, the Cruise Control should disengage.
I looked at a conversion for my 2013 FLS Slim to the 2017 FLSS ECM/throttle/et-al, but
like you said, it was about ~$2K or more cost. The one thing I did not know if it would
work is to put my 2013 VIN into the 2017 ECM since I have an HD combo speedo/tach.
I am guessing it would show "VIN-ERR" and not work...
Thanks for any clarification,
T.
MODS, IF YOU WANT TO LOCK THIS THREAD PLEASE DO, THE LINK I DROPPED ABOVE WILL CARRY ON THIS CONVERSATION.
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