Author Topic: Exhaust fit  (Read 664 times)

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Offline Donald

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Exhaust fit
« on: February 04, 2019, 09:29:06 pm »
Hi all,
Got an exhaust system from Armour's, nice chrome, my question is how far should it fit  into head ? It looks as if it should go in 1/2 inch, but I can only jiggle it in about 1/8 inch. The port is clear/ clean,  have given it a tap with block of wood , but does not want to go in any further . Any suggestions?

Offline hampshirebiker

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Re: Exhaust fit
« Reply #1 on: February 04, 2019, 10:05:49 pm »
Probably still a bit of carbon in the port Donald. I had the same problem on my Douglas and cleaned them with emery rigged up in an electric drill.
Postal - Liphook Hants - But just into West Sussex.

Offline NUT663

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Re: Exhaust fit
« Reply #2 on: February 04, 2019, 10:06:08 pm »
Hello Donald,
i bought one from Armour's recently for my C12 and had the same issue. Rather than force it into the head I removed a little metal from the pipe (very carefully) and it's fine now. No leaks.
Andrew

Offline Donald

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Re: Exhaust fit
« Reply #3 on: February 04, 2019, 10:25:26 pm »
Thanks for that, so it should fit deeper into head,? Will try both suggestions tomorrow in the light of the day,

Offline hampshirebiker

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Re: Exhaust fit
« Reply #4 on: February 04, 2019, 10:32:31 pm »
Just be careful if you have got a faulty pipe. You can't return a damaged one.
Postal - Liphook Hants - But just into West Sussex.

Offline Donald

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Re: Exhaust fit
« Reply #5 on: February 04, 2019, 10:45:22 pm »
Thanks H B , it looks like a nice fit everywhere else, just wondering if the chrome is a little bit too thick at that end.

Offline Owen

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Re: Exhaust fit
« Reply #6 on: February 04, 2019, 10:52:02 pm »
Could be a little distorted from the bending process. Try twisting it a little in the head and notice the marks on the chrome. Have you looked to see if there is a shoulder in the port, that will gi e you a guide as to the depth?
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Offline NUT663

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Re: Exhaust fit
« Reply #7 on: February 04, 2019, 11:53:05 pm »
That’s all good advice. There is nothing wrong with the port in my cylinder head. It’s clear of carbon and has no step.  The original (probably BSA) pipe fitted fine. The one Armours sent had a slightly larger diameter. I could have sent it back but impatience got the better of me.
Andrew

Offline timsdad

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Re: Exhaust fit
« Reply #8 on: February 05, 2019, 08:15:32 am »
I normally dummy-fit them into the head or barrel with the pipe sticking out laterally so it can be twisted up and down while pushing in. This ensures that it will actually go in the hole far enough before removing and refitting in the correct place. The pipe end may need de-burring with a flat file if it hasn't been cut clean enough.

A bit of grease will help for the initial fit but I will clean this off the pipe once it's been in and put a bit of silicone sealer round it to help the sealing and prevent popping and banging from air leaks.


Ray
Just a motorcyclist.

Offline Pete

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Re: Exhaust fit
« Reply #9 on: February 05, 2019, 11:14:55 am »
Try the back end of the pipe in the port, that will be round. If that fit's, then there is slight ovality at the port end. This is easy to carefully knock out with mallet. I did this as standard to all A10 pipes before dispatching from Armours.
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Offline timsdad

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Re: Exhaust fit
« Reply #10 on: February 05, 2019, 12:50:39 pm »
Place gone to rack and ruin since you left, Pete!

Ray
Just a motorcyclist.

Offline Donald

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Re: Exhaust fit
« Reply #11 on: February 05, 2019, 01:58:00 pm »
Hi all,
Back end of pipe doesn't fit in exhaust port,
Port diameter is 1.5" the pipe is 1..53.
Heated head with blow torch, still no fit.
So rather than send back to Armour,out with the Emery cloth , masked of the pipe and start sanding. Eventually last 3/4 inch of piping is a tight fit in port, bracket needed a a slight tweak with rubber hammer.
That's the first time I have had a problem with any of Armour's products ,so I will forgive them on this occasion .




Offline Pete

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Re: Exhaust fit
« Reply #12 on: February 05, 2019, 04:26:28 pm »
As Ray says :)
1948 BSA C11
1932/56 C12Rudge
N.B. Andromeda
Volvo V40

Offline MilitaryRon

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Re: Exhaust fit
« Reply #13 on: February 05, 2019, 07:30:52 pm »
Many years ago when the pipe for my M20 wouldn't fit, I used a flap wheel in my electric drill that was a tight fit in the port. It only took a few seconds and the pipe went all the way home.....And then a finger of Holts exhaust paste. Ron

Offline hampshirebiker

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Re: Exhaust fit
« Reply #14 on: February 05, 2019, 07:39:01 pm »
Thank you Ron. I would have thought that would be the first thing to do.
Postal - Liphook Hants - But just into West Sussex.