Paul,
Check the floats and float valves for leakage.
This article may be of any help:
http://www.jcna.com/library/tech/tech0006.html
Kees Oudesluijs
NL
Paul Leeks schreef:
> I have just rebuilt and refitted the twin H4 SU carbs to my 100/6 but I am
> having trouble with (quite a bit of) petrol leaking out of both carburettors.
>
> I am pretty certain that everything has been put back together properly
> (being a novice, I followed the SU instructions to the letter).
>
> The leak seems to be in the main part of each carb (ie needle/jet area). I
> have checked the valves in the float chamber lids for leaks and checked the
> gap for the forked levers, so I am pretty certain that these are ok.
>
> I am wondering whether the problem is the needles. When I ordered the new
> ones from Burlen, the specification stated that I needed 'AJ' needles.
> However, I noticed when renewing them that the old needles were slightly
> longer (about 1/8") and were stamped 'AR'. Would this be the issue?
>
> Any thoughts, as always, greatly appreciated.
>
> Cheers
>
> Paul Leeks
>
> 100/6 BN4
>
>
>
>
>
>
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