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Exhaust stubs #487365
04/25/13 11:08 am
04/25/13 11:08 am
Joined: May 2006
Posts: 148
Warrington, Cheshire, UK
TriVin Offline OP
BritBike Forum member
TriVin  Offline OP
BritBike Forum member
Joined: May 2006
Posts: 148
Warrington, Cheshire, UK


One of the exhaust stubs on my 72 Bonnie just fell out! When the new one arrived, 70-9516, it was not what I expected! Having discussed this with my local Triumph parts supplier it would appear that a previous owner has modified a push in head to take push over exhausts. However, the other exhaust stub, which I cannot remove for love or money, clearly has a thread on it as you can still see about 2 threads showing whereas the LH side is smooth but tapered, 36.5mm down to 35.5mm. All very mysterious!
Before I find someone who can make me a 'special' does anyone of you UK guys know if someone amongst the many Triumph specialists here in the UK already supplies these things?


Dave
Tiger 100SS 1966
T120V 1972
Vincent Comet 1952
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Re: Exhaust stubs [Re: TriVin] #487382
04/25/13 1:28 pm
04/25/13 1:28 pm
Joined: Dec 2004
Posts: 9,063
Scotland
kommando Online content
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kommando  Online Content
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Joined: Dec 2004
Posts: 9,063
Scotland
You need to contact Seager Engineering who CNC these stubs in over sizes, sounds like you need the same service I do eg one port needs a new thread which they do also.

http://www.ebay.co.uk/itm/TRIUMPH-650cc-...=item5648cade2a

Re: Exhaust stubs [Re: kommando] #487388
04/25/13 2:28 pm
04/25/13 2:28 pm
Joined: May 2006
Posts: 148
Warrington, Cheshire, UK
TriVin Offline OP
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TriVin  Offline OP
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Joined: May 2006
Posts: 148
Warrington, Cheshire, UK
Actually the opposite to you. Somehow, for some reason that new part I bought was way to big to fit the hole. The threaded part of that new one measures 1.625" or 1 5/8".
My port measures 36.5 mm or 1.437" in old money. That's 1 7/16".
And no thread visible just tapered slightly.
I just don'y know what I've got here at all.
I'll email Seager though, they may know and supply other types.

Cheers


Dave
Tiger 100SS 1966
T120V 1972
Vincent Comet 1952
Re: Exhaust stubs [Re: TriVin] #487391
04/25/13 2:45 pm
04/25/13 2:45 pm
Joined: Dec 2004
Posts: 9,063
Scotland
kommando Online content
BritBike Forum member
kommando  Online Content
BritBike Forum member
Joined: Dec 2004
Posts: 9,063
Scotland
Someone has welded up your port, it needs boring out and tapping to take the proper stub, mine had a stub with the plain end stuffed in a threadless port, which will need welding etc etc.

Re: Exhaust stubs [Re: kommando] #487403
04/25/13 4:25 pm
04/25/13 4:25 pm
Joined: Jul 2009
Posts: 3,549
Vic. Australia
P
Pete R - R.I.P. Offline
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Pete R - R.I.P.  Offline
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P
Joined: Jul 2009
Posts: 3,549
Vic. Australia
Late '72 had push-in pipes,not screw-in spigots.
I'd never butcher one of these heads by tapping a thread in it.Just turn up another push-in spigot,and make it a tighter fit.It does very little damage,if it ever comes loose.

Most push-in pipes are a loose fit,and that causes no great harm.

If a threaded spigot gets very loose (it can happen,and does),then you've got some real damage.

Re: Exhaust stubs [Re: TriVin] #487576
04/26/13 11:59 pm
04/26/13 11:59 pm
Joined: Nov 2005
Posts: 7,258
Back on the mainland!
JubeePrince Offline

Life member
JubeePrince  Offline

Life member
Joined: Nov 2005
Posts: 7,258
Back on the mainland!
There's a good thread (no pun intended!) on this topic with a cutaway photo by John Healy, here:

http://www.britbike.com/forums/ubbthread...true#Post319811

Steve


'77 T140J
"Vintage Bike". What's in your garage?

"The paying customer is always right."

Fitting round pegs into square holes since 1961...

Moderated by  John Healy 


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