Tim, I just happen to have a set of balance tubes laying in my shop floor from
an Alpine I scraped out- the rust was to far gone to save the beast- I can
check the thread on it and perhaps I saved the nut and a piece of the line-
although my son was helping and he isn't as prone to keeping every bit and
piece. Just let me know and I will take a ride to my shop and see if I can be
of help.
regards, Tony
--- On Tue, 5/22/12, Ron Fraser <rfraser@bluefrog.com> wrote:
From: Ron Fraser <rfraser@bluefrog.com>
Subject: Re: [Tigers] Balance pipe nipple thread
To: "'tim '" <crabco@shaw.ca>, tigers@autox.team.net
Date: Tuesday, May 22, 2012, 3:31 PM
Tim
I believe the fuel line on my Tiger at the balance pipe is 5/16
tubing. I recall the tube nut was about 2x longer than the standard tube
nut I could find so I reused the original; more threads, better contact.
5/16 tube nut thread is 1/2 - 24.
If you have a thread gage you should be able to determine what thread you
have.
UNF = unified fine thread which is similar and compatible with fine thread
in the USA
Pipe thread generally has a taper but I believe there is also a British
Parallel pipe thread.
Additional info on threads and more
http://www.britishfasteners.com/
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of tim
Sent: Tuesday, May 22, 2012 3:12 PM
To: tigers@autox.team.net
Subject: [Tigers] Balance pipe nipple thread
Listers,
The parts book calls for a 1/2" UNF tube with a compression sleeve where the
fuel line meets the balance pipe. I went through this with my Alpine and as
I recall, the 1/2" UNF tube nut worked fine.
The balance pipe I have for the Tiger seems to have a different thread. My
local supplier was stumped and said it almost looks like a Whitworth thread.
Does anybody have insight into this? I bought the pipe on EBay as the
original was trashed so it possibly came from a different model? I guess I
could cut the nipple off and weld on a new one or find a different pipe
altogether but I am still puzzled by this.
Thanks,
Tim
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