Exhaust nuts

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May 3, 2026 | 09:19 PM

#11

LQQK_OUT

Seasoned HDF Member

Joined: Nov 2006

Posts: 5,889

Likes: 1,903

From: East Coast, USA

Quote:

Originally Posted by Addicted to Chaos

Shouldn't have to do anything to keep them from loosening up, just make sure they are one time use and you will be fine.

I've lost a few exhaust nuts over the years. I'm guessing they vibrate off. I now use a 5/16-24 jam nut on top of the exhaust nut. Haven't had a problem since I started using the jam nut.

https://www.lowes.com/pd/Hillman-5-1...-Count/3058797

May 3, 2026 | 09:23 PM

#12

Rounders

Seasoned HDF Member

Joined: Mar 2021

Posts: 18,272

Likes: 3,684

From: backwoods

Quote:

Originally Posted by LQQK_OUT

If it happened to me, I might to. But just never happened to me

I have found 1/4 drive ratchets work good for this.

May 4, 2026 | 07:13 AM

#13

Fritz Franz

Advanced

Joined: Aug 2019

Posts: 76

Likes: 23

From: winter haven florida

I have followed the torque sequence stated in FSM on my '06 TC through every header removal/reinstall, stock and ProPipe and never had an issue with loose header nuts. I'm gonna get those brass Colony nuts just because (brass!).

May 4, 2026 | 08:47 AM

#14

skydude426

Club Member

Joined: Sep 2010

Posts: 1,690

Likes: 457

Any time I have the header nuts off or loose, I torque them to the service manual specs. After the first ride and the bike has cooled down, I retorque them. Then again, after the second ride and the bike is cooled down, I retorque them one last time. So far, I haven't had a problem with one coming loose (knock on wood).

May 4, 2026 | 09:05 AM

#15

glasspilot

Road Master

Joined: Nov 2009

Posts: 1,227

Likes: 417

From: Outer Banks, NC

I've never had a problem with the nuts coming loose or being hard to come off. My problem was one stud frozen in the head. The stud threads had been damaged and I wanted to replace it. I never could remove it so I just threaded a new nut on the damaged threads and it never loosened. Now it's a mute point because the engine has been replaced with a S&S T111 engine!

May 4, 2026 | 10:11 AM

#16

The Big Papa

Intermediate

Joined: Jun 2022

Posts: 25

Likes: 8

From: N. Minneapolis

Loosening

Quote:

Originally Posted by Mongo1958

Looking for the size of the exhaust nuts at the heads. I want to double nut them to prevent them from loosening up.
Thanks

Loosening is the least of the problems. Can't get them out is more common.

May 4, 2026 | 11:46 AM

#17

Mongo1958

Thread Starter

Stellar HDF Member

Joined: Aug 2011

Posts: 2,765

Likes: 1,802

From: Newnan, GA

Quote:

Originally Posted by LQQK_OUT

This is why I needed the size. I plan to use them as a jam nut. Just installed them.

May 4, 2026 | 10:24 PM

#18

Addicted to Chaos

Road Master

Joined: Apr 2023

Posts: 975

Likes: 1,364

From: South of Heaven

Quote:

Originally Posted by MotoJockey

Which ones are you saying should be one time use? The steel ones or the brass ones? I've never changed out the steel ones on any of my bikes and have used them plenty of times. Just a tiny bit of never-seize and good to go. Never used the brass ones, but curious about them tho........

Steel. Never tried the brass ones...