Rear Cylinder Exhaust Pipe Heat ? - Road Glide Forums
Intake and Exhaust Intake and Exhaust Systems for Road Glides

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post #1 of 31 (permalink) Unread 07-11-2019, 05:42 AM Thread Starter
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Rear Cylinder Exhaust Pipe Heat ?

I am working on getting the heat issue better on the M8 rear cyl exhaust pipe. I am tired of getting the inside of my right leg fried in our Florida traffic and heat. I have installed a de-catted oem header, helped some. I am thinking of removing the heat shield, wrapping the rear cylinder exhaust pipe and re-installing the heat shield. Looks like the clamp is long enough to do that. Maybe I will remove all the heat shields and have them coated to help a bit as well.

Has anyone done the wrap and re-installed the heat shield, if so, how did it work out? It is either that or buy a Goldwing.

2018 FLTRXS, Vivid Black, KW Slicer Front Fender, Sundowner Seat/Modified by Mean City Cycle
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post #2 of 31 (permalink) Unread 07-11-2019, 06:36 AM
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Originally Posted by FLTRXS18 View Post
I am working on getting the heat issue better on the M8 rear cyl exhaust pipe. I am tired of getting the inside of my right leg fried in our Florida traffic and heat. I have installed a de-catted oem header, helped some. I am thinking of removing the heat shield, wrapping the rear cylinder exhaust pipe and re-installing the heat shield. Looks like the clamp is long enough to do that. Maybe I will remove all the heat shields and have them coated to help a bit as well.

Has anyone done the wrap and re-installed the heat shield, if so, how did it work out? It is either that or buy a Goldwing.
Wrapping the header will help some but there is a consequence in doing this. It will make your header brittle and it will start cracking and then you will have to replace it. I've seen this happen in just 2-3 riding seasons.

Have you tried the mid-frame heat deflectors or considered the HD fans?

2018 FLTRXS
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post #3 of 31 (permalink) Unread 07-11-2019, 07:14 AM Thread Starter
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^^^^ Bummer, did not think of that, I do have the mid-frame heat deflectors. Back to the drawing board.

2018 FLTRXS, Vivid Black, KW Slicer Front Fender, Sundowner Seat/Modified by Mean City Cycle
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post #4 of 31 (permalink) Unread 07-11-2019, 12:50 PM
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What kind of mufflers are on it?

If they are restrictive, then there is no way to get the heat out of the pipe. Past that, a fatter tune will pull 50-100f off that pipe.
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post #5 of 31 (permalink) Unread 07-11-2019, 01:05 PM
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Check out Captain Itch. They have leather heat deflectors/shields that cover much more and you can have it plain or customized with stitching or studs. Had a plain one on my 12 Ultra and worked and looked great
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post #6 of 31 (permalink) Unread 07-11-2019, 01:55 PM
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What kind of mufflers are on it?

If they are restrictive, then there is no way to get the heat out of the pipe. Past that, a fatter tune will pull 50-100f off that pipe.
Is there a consensus or perhaps a list of what mufflers/slip-ons get rid of the most heat? My bike has V&H Power Duals (no cat), FP3, some sort of Screaming Eagle mufflers, Big Sucker AC, and the Harley CoolFlow Fan. I am still getting cooked and am thinking it is the mufflers that are restricting me. All of this stuff came on my bike when I bought it and I have had the guys at V&H customize tunes for me to help.

I definitely DO NOT want my bike to be louder (especially at highway speeds), but I am tired of having my right leg/thigh get roasted.


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'15 FLTRXS - V&H Power Duals w/ Screamin' Eagle Street Cannons - Arlen Ness Big Sucker - BT4180.14 w/Arc Moto 602v2 and Polk MM652 - Le Pera Maverick Daddy Long Legs - Advan Lowers - Freedom Shield 15"
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post #7 of 31 (permalink) Unread 07-11-2019, 02:17 PM
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Iam on a TC, so maybe no comparison. I wrapped my rear pipe on my 2>1 Reinhart in an attempt to reduce the heat. Made absolutely no difference, except I only look down 5 or 6 times thinking my jeans are on fire, instead of every 30 minutes.
I installed the HD Cool Fan on my 15 and that made a BIG difference! The local dealer told me it would not fit (I did have to drill new mounting holes) and then told me that I would not work with the Canbus.
Iam on my second summer with it

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post #8 of 31 (permalink) Unread 07-11-2019, 02:56 PM
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Originally Posted by macabra11 View Post
Is there a consensus or perhaps a list of what mufflers/slip-ons get rid of the most heat? My bike has V&H Power Duals (no cat), FP3, some sort of Screaming Eagle mufflers, Big Sucker AC, and the Harley CoolFlow Fan. I am still getting cooked and am thinking it is the mufflers that are restricting me. All of this stuff came on my bike when I bought it and I have had the guys at V&H customize tunes for me to help.

I definitely DO NOT want my bike to be louder (especially at highway speeds), but I am tired of having my right leg/thigh get roasted.
If you can see through it, end to end, it will lower the heat at the pipe, assuming the cat fell out.

But those straight through glass packs tend to be loud. SE only sells db compliant cans now, and I doubt any of them are straight through. Fact is, you prolly couldn't shake 000 buck through them if you had a paint shaker.

I listened to a lot of cans in the last few months, and looked at a lot of dyno ponography. The S&S mk45 is what I settled on. Pretty quiet at idle and light load, but bark when you roll the power on. Real deep tone all the way through.


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post #9 of 31 (permalink) Unread 07-11-2019, 04:10 PM Thread Starter
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Originally Posted by Thermodyne View Post
What kind of mufflers are on it?

If they are restrictive, then there is no way to get the heat out of the pipe. Past that, a fatter tune will pull 50-100f off that pipe.
I have HD street cannons, not as good as aftermarket. Keeping HD until my warranty is out.

2018 FLTRXS, Vivid Black, KW Slicer Front Fender, Sundowner Seat/Modified by Mean City Cycle
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post #10 of 31 (permalink) Unread 07-11-2019, 04:12 PM Thread Starter
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Check out Captain Itch. They have leather heat deflectors/shields that cover much more and you can have it plain or customized with stitching or studs. Had a plain one on my 12 Ultra and worked and looked great
Thanks for posting the info, I was going to ask about this company, but could not remember the name.

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