Donald :
It's definitely not a standard thread in H6 carbs, so it's probably not in
H2s either. Most of the threads on the H6 are BA (British Associated), but
I haven't (yet) been able to identify the mixture adjustment or the float
valve.
No clue about HS2/4/6.
Randall
59 TR3A daily driver
> -----Original Message-----
> From: owner-triumphs@autox.team.net
> [mailto:owner-triumphs@autox.team.net]On Behalf Of Donald H. Locker
> Sent: Thursday, March 09, 2000 7:01 PM
> To: spitfires@autox.team.net; triumphs@autox.team.net
> Subject: SU float valve thread
>
>
>
> Hi, all.
>
> Anyone know (off hand or by any other method) what the thread spec is
> for the float valve of the SU H2 (or HS2) carbs? I think one of my
> needle valves is leaking around the threads and I want to check the
> thread in the lid before attempting to replace the valve. I don't
> want to try to tighten it without being sure it's not buggered (sorry
> to be so crude, but that's what it looks like from here.) It seems
> to be nearly 1/4-28 or perhaps 6mm-1.0, but not quite either. Another
> British spec thread?
>
> Thanks,
> Donald.
>
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