SOHC.co.uk Forums > CB500/550
Cb 550 ss spain
murdock:
all the spark plugs are black, now with the original air filter it is a pain of bollocks to remove the carburetors, I will try to measure the height of the gasoline in each carburetor to see if I can find out something,
Soon I will receive new orings for the yets, I will try to change them with the carburetors on the bike, maybe when I open them I will find something, I do not know
K2-K6:
Definitely wait to try those seals for the jets first.
As you've already checked most of the other items and still have something odd, these would have that effect.
From your description (black plugs and black smoke) it sounds like just too much fuel is being taken into the engine. All of the fuel is supposed to be carefully measured through the jet size, but if there's another way round that jet with failed seals it will just suck through that route too and add excess fuel to the main jet volume.
Hopefully the seals will give you a significant change to see.
murdock:
https://anonfiles.com/7dL6Z8Xdu0/fallo_mp4
Johnny4428:
This is proving such a pain for you this running issue Murdock. I assume when you state that your mixing screws are 1 1/2 turns in! You mean 1 1/2 turns out from softly seated. Sorry if I’m stating the obvious. I would be very surprised if some of the forum members don’t come up with a solution on this ongoing issue. There’s probably quite a number on here that would love to have the bike in front of them to give a good check over to help get to the bottom of it. Good luck! Hope you get sorted soon.
murdock:
creo que no hace falta responder a tu pregunta .
lo siento si no se entiende , pero debo usar el traductor de google para intentar salvar la barrera del lenguaje
I don't think it is necessary to answer your question.
sorry if it is not understood, but I must use google translator to try to overcome the language barrier
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