My contact was able to rescue a handful of those funky springs from the recycling bin and we'll be sending them my way.

That will save a lot of bother trying to import them and you'll have plenty of spare ones.

If it is the spring on the air bleed screw you are referring to, not all of them had a spring.
One of my earlier Zeniths has a brass lock nut on the thread which looks original. Bit fiddly to operate but once locked down, you won't be adjusting it again in a hurry.

Craig.

One of the Zeniths BFS rebuilt forr had locknuts on both throttle and air bleed screws. I had them replaced with springs.

Quote from: Craig T on Sep 22, 2023, 09:09 AMIf it is the spring on the air bleed screw you are referring to, not all of them had a spring.
One of my earlier Zeniths has a brass lock nut on the thread which looks original. Bit fiddly to operate but once locked down, you won't be adjusting it again in a hurry.

Craig.

Nope, the spring pictured in post #54.

So I finally given up on the chinese Zenith and the weber.
Bought an old original Zenith and a rebuild kit
However, just looked at my carb and spotted what looks like a crack in the spacer (see photos).  Could this be the source of all my problems - although I doubt it as engine runs rich rather than lean.
If I fit a new spacer should I use gaskets or not?
Many thanks
Steve

Yes - ideally a gasket either side. The air leak from the crack may be adding to your problems. Strange things happen when air flow is disrupted.

There has been a lot of talk about Webber's and Zenith, be they original or Chinese copies, but nothing about Solex

Mine has the original Solex fitted and runs just fine. Aren't they an option?

I love a solex, externally mounted jets so changing/cleaning them is a doddle, metal float and no o-rings for E10 to destroy. Possibly a little more thirsty than a zenith, but not enough to worry about😇

Jon

I like my Weber carb and my Webber bbq😂. The Weber carb has given almost 10 years of faultless service and returns 22-24 mpg on a long run. My Webber bbq has given 20 years of faultless service too

Quote from: nathanglasgow on Sep 23, 2023, 05:32 PMI like my Weber carb and my Webber bbq😂. The Weber carb has given almost 10 years of faultless service and returns 22-24 mpg on a long run. My Webber bbq has given 20 years of faultless service too

Which Webber are you using?

Just a quick update on my carb saga.
Firstly, I have now bought an original second hand Zenith and am having it refurbed by Carburettor Exchange in Leighton Buzzard (although there is a back log of 8 weeks).
In the mean time, I dismantled my Chinese Zenith copy. I found that the large rubber ring that seals around the venturi between the upper and lower chambers was quite different from the one in a rebuild kit I had. The rebuild ring was a much tighter fit on the venturi - so I fitted it! Lo and behold, the carb stopped over fuelling and idled nicely. It seem that this rubber ring may well be the main issue. Hope that helps anyone struggling to get these copy carbs running

I've found that dropping the O ring into hot water before fitting helps assembly as does a smear of silicone grease.
This helps the top cover go on easily and you don't have to use the cover screws to pull it together. Seal was supposed to be NOS, either way warm and slippy is good.

Original Solex - a good carb giving a punchy drive and reliable too.

I know have a very limited amount of the springs pictured below. I'm not sure if I'll be able to get any more or not.

If anyone needs one let me know.

 

Larry

Quote from: stevesharpe on Sep 28, 2023, 10:47 AMJust a quick update on my carb saga.
Firstly, I have now bought an original second hand Zenith and am having it refurbed by Carburettor Exchange in Leighton Buzzard (although there is a back log of 8 weeks).
In the mean time, I dismantled my Chinese Zenith copy. I found that the large rubber ring that seals around the venturi between the upper and lower chambers was quite different from the one in a rebuild kit I had. The rebuild ring was a much tighter fit on the venturi - so I fitted it! Lo and behold, the carb stopped over fuelling and idled nicely. It seem that this rubber ring may well be the main issue. Hope that helps anyone struggling to get these copy carbs running

For grins-n-giggles... here's a pic showing the O-ring that came off of mine as opposed to the one in the rebuild kit.  The Zenith was first rebuilt (not by me) sometime around 2006 or so; assuming the O-ring was replaced with the appropriate type it makes me wonder how fast those things deteriorate.