2024+ Center-Cooled Touring Models 2023.5+ CVO and 2024+ Road Glide/Street Glide/Street Glide Ultra Center-Cooled Gen 2 M8 Touring models

Questions About the New Style Throttle

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Old Jun 18, 2025 | 07:36 AM
  #11  
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Originally Posted by jwt873
To expand on Andrea 73's post.... 'Center-cooled' refers specifically to liquid cooled touring bike engines with a single radiator mounted on the frame The previous liquid cooled touring bikes had two radiators, one in each fairing lower and are known as 'Twin-cooled'. This is described in the HD service bulletin in the link below.

https://static.nhtsa.gov/odi/tsbs/20...54120-0001.pdf

"Introduced in select redesigned 2023 and 2024 CVO and
Touring models. Identified by a single liquid cooled radiator,
centrally located, and having a coolant reservoir located next
to the left frame downtube. This system utilizes an electric
coolant pump
".
So basically, if the position of the radiator is the deciding factor, then the Softail models have been center cooled since 2018.
I really thought that the term was referring to the new configuration of the Gen 2 engine. So Andrea 73, my apologies. My 2025 LRST has the Gen 2 engine and shares the throttle actuation with the earlier touring models.
 
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Old Jun 18, 2025 | 07:44 AM
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Originally Posted by jake24lt
If its the same as the touring controls, then the throttle actuator is part of the controls It looks like a donut , that the grip slides into. So there is no splined throttle sleeve. The end of the grips don't have to seat in a spline like the previous bikes.

Thanks, that is most of what I needed to know. How much longer the grip area is would help also, if anyone has that information. What I am trying to figure out is if there is a way to use a set of handlebars from a Sport Glide without too much modification. It is beginning to look like it will require cutting the bar and welding new tubing for the grip ends. Of course, the openings for the wiring will have to be in the right position and be the right size also.
 
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Old Jun 18, 2025 | 07:52 AM
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Originally Posted by $tonecold
So basically, if the position of the radiator is the deciding factor, then the Softail models have been center cooled since 2018. :icona_cool:
I really thought that the term was referring to the new configuration of the Gen 2 engine. So Andrea 73, my apologies. My 2025 LRST has the Gen 2 engine and shares the throttle actuation with the earlier touring models.
First of all, your Low Rider ST is today one of the most beautiful Harleys! Your Gen2 engine is also HO (High Output). The throttle on the >23.5 Touring doesn’t work well for me because I can’t find a balance, and feels like an on/off switch.
 
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Old Jun 18, 2025 | 07:53 AM
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Originally Posted by mjwebb
you done with breaking in and let er' rip yet? curious on your opinion of it, pretty stout stock engine and being over 100 lbs lighter than my touring 117 it oughta' satisfy most 'normal' riders I suspect. the monoshock with 4" travel and inverted forks must be awesome too..that bike just might be the ticket to haul *** on right out of the box
I did the initial break-in run, 40 miles of varying the rpm's in second, third, and forth gear. Dropped the oil and refilled. I have not ridden it again yet, but just from that little bit of riding, it is obvious it has quite a bit of punch. It may be the first Harley in a long time that I haven't felt inclined to modify extremely. I never got around to modifying my 2017 RGS, but I had everything to do it. This bike could probably be satisfying with a muffler and air cleaner change, or aftermarket cam at the most. As for the suspension, it rides obviously better than my Sport Glide.
 
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Old Jun 18, 2025 | 09:37 AM
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Originally Posted by $tonecold
Thanks, that is most of what I needed to know. How much longer the grip area is would help also, if anyone has that information. What I am trying to figure out is if there is a way to use a set of handlebars from a Sport Glide without too much modification. It is beginning to look like it will require cutting the bar and welding new tubing for the grip ends. Of course, the openings for the wiring will have to be in the right position and be the right size also.
The bars have different hole locations than than the pre 23.5-25s as the wiring routing is different ,along with the mounting. I guess if you own a dremel you could conceivably do it. But I i would guess it would be easier to buy a set of bars made for your bike.


and this:
 
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Old Jun 19, 2025 | 04:12 PM
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@Nutty built his own bars. Nutty, can you provide some input for Stonecold?
 

Last edited by BrandonSmith; Jun 19, 2025 at 04:18 PM.
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Old Jun 22, 2025 | 11:34 AM
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Originally Posted by BrandonSmith
@Nutty built his own bars. Nutty, can you provide some input for Stonecold?
Any additional input would be welcome.

I was at the dealer yesterday, picking up some parts, and I was checking out the moto bars that come stock on the Road Glide ST. They would work for what I want to do, but I think they may be a little higher than I would like. While there, I talked to the service manager about the difference between the bars for the new switch packs and the older bars. He said that there have been people that installed the older bars on the bikes with the new switch pack. There were of course modifications necessary. One thing he did that will help me substantially is he gave me a set of stock bars from a batwing touring model that had the new switch packs. That will help to locate the wiring holes and the indent holes if I decide to modify the Sport Glide bars that I would like to use. One other thing that occurred to me was figuring out what the position of the holes should be, and then cutting the Sport Glide bars to remove the grip/switch sections, and then cutting the bars that were given to me and welding the grip/switch pack ends to the Sport Glide bars. It would involve some labor, but I can get them welded at work for nothing and then I would need to get them powder coated again, but it should still be less than new bars. Also I would have a set of bars that I think I would like and there likely wouldn't be others out there. I am going to assess this further.
 
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