SOHC.co.uk Forums > CB350/400

Fuel everywhere...

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buxtonmick:
Just a quick one to confirm my thoughts....I fired up the 400/4 today at long last after complete renovation and engine rebuild, and amazingly it runs and idles really well but unfortunately while the fuel is turned on it also runs from all the carb 'overflow' tubes.  Float heights wrong or needle valves stuck?  Or any other problem as it flows from each of the tubes?

Thanks, Mick.

steven400/4:
give all the bowls a tap see if it free it mine stoped leaking when i did it

PatM:
Hi Mick- a common problem we have with them! I'm presuming that you have striped/cleaned and re-jetted with a whole kit? Mine does exactly the same now an then and as is said above, a sharp tap with a hammer once you have rushed to turn the fuel off usually unsticks the flat valves. I doubt its much more than that!

Bryanj:
usually stuck float needles or floats stiff on the pivot pins but I have seen float bowls with cracked overflow pipes

Bitsa (Ralph Wright - RIP):
Hi,
The only time I have had that happen is what Bryan said overflow tube split.
Cheers
Bitsa

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