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Old Mar 9, 2020 | 08:53 AM
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Default Throttle By Wire

Here's a question I never thought I'd ask.

I just finished up my new bars on my '17 FXDB and they look awesome...except all the friggin cables cluttering it up. The '17 FXDLS has a throttle by wire setup, has anyone converted to it? Does anyone know if it's possible to convert?
 
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Old Mar 9, 2020 | 10:44 AM
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Unfortunately not. At least not at this point. Unless you wanna swap pcm (and any other modules that store the vin), throttle body, add a tgs, etc.

heres an older thread on the subject.

https://www.hdforums.com/forum/sport...-throttle.html
 
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Old Today | 08:44 AM
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I'm going to revive my own thread from 6 years ago, At the time I posted this, I had never owned an FI Harley, flash forward and let's just say, I'm pretty well versed now so it's time to revisit the topic seriously.

My motivation has gone from "those ugly cables" to man, I would really love REAL cruise control. 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
  • Wiring harness 39201569A
  • Throttle control 32700050
  • Throttle tube 65100075
  • Left lower switch housing (cruise control) 71500282 and switch 71500290
  • Induction module 22200002
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?
 

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Old Today | 09:51 AM
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I'd question if the tune used to run your bike could be loaded into a different part # ECM, but I'd be surprised if it couldn't. I'd suspect some tweaks to the tune would be required to make the throttle by wire work though. Might be worth a call to Fuel Moto to see if they're aware of any possible complications.
 
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Old Today | 09:54 AM
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Originally Posted by Reindeer
I'd question if the tune used to run your bike could be loaded into a different part # ECM, but I'd be surprised if it couldn't. I'd suspect some tweaks to the tune would be required to make the throttle by wire work though. Might be worth a call to Fuel Moto to see if they're aware of any possible complications.
I thought the same. I did shoot them an email this morning asking specifically about the HPI 58/62 I'm running and how I can keep it, but I also asked if they had seen any bikes that the conversion had been made on, I mean I can't be the ONLY one right?

EDIIT: after re-reading your post it dawned on me that I'd probably have to get another license for the PV2, unless you meant asking FM if they could do it for me. But wait, isn't it a VIN lock? If so, it should still work since the new ECM would have to have the VIN loaded to it. I discussed the swap with my favorite AI this morning and it confirmed my parts list so that's encouraging.
 

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Old Today | 11:26 AM
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It's a big job. Here's one where he converted to tbw. You would need a different calibration for sure.
 
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Old Today | 11:32 AM
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I hadn't even considered the VIN lock thing, but I'm sure they could get around that. I was more concerned if the ECM is different enough to require different software thus requiring a new tune, but I wouldn't think that would be an issue as I'm sure they're the same other than the additional connector. I also didn't think about the throttle body, but I'd be surprised if you didn't need to replace that. Not sure how you could convert a cable TB to an electronically controlled one, unless someone makes some kind of retrofit kit.

All of this sounds expensive, but we own modified Harleys so we're already used to that.
 
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Old Today | 11:39 AM
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Originally Posted by Lonewolf176
It's a big job. Here's one where he converted to tbw. You would need a different calibration for sure.
https://www.youtube.com/watch?v=J-O2d1NPoJs
Good info, thanks for that!

I'm going to have it a LOT easier though. The harness on my bike is a direct swap for the FXDLS version, all the same plugs and positions it just has the TBW and ABS wiring added into it.
 
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Old Today | 11:47 AM
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Originally Posted by Reindeer
I hadn't even considered the VIN lock thing, but I'm sure they could get around that. I was more concerned if the ECM is different enough to require different software thus requiring a new tune, but I wouldn't think that would be an issue as I'm sure they're the same other than the additional connector. I also didn't think about the throttle body, but I'd be surprised if you didn't need to replace that. Not sure how you could convert a cable TB to an electronically controlled one, unless someone makes some kind of retrofit kit.

All of this sounds expensive, but we own modified Harleys so we're already used to that.
I just looked up the TB situation on the HPI site, they are of course, very different and around $600. I rough estimated all the parts including the ECM and new harness and it'll be around $1300 (not including the new TB). This is my forever bike we're talking about though, so it'd be worth it to me. I would think in a perfect world, the dealer could VIN set the new ECM, I drop all the parts in the bike, the PV recognizes the VIN and I reupload my tune, run a few logs, send them to FM and update the tune they did for me on their dyno, then I'm golden. Easy-peasy
 

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Old Today | 12:06 PM
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I missed the fact that HPI needs the throttle body core, so there'd be the additional cost of whatever parts they need to build the new one.
Throttle-By-Wire 2008-2016 | HPi Hard Parts
 
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