Cb 550 ss spain

[murdock]

Do you believe ? Now that you mention that before the reconstruction I had another type of cover, a cast aluminum one made in France, and now I have one that I bought from a kz that is narrower, I am a race without the cover to see if I notice any changes, but I do not think it's that

 today I started the bike in complete darkness with the spots exposed,
at start-up there was a small fart, only one, a small piff typical of a leak,
 I still don't spray the carburettors one or two little red blue sparks came out of the 1.4 platinum, but then revving for a few minutes never happened again, all this in the dark
total.
I don't have a strobe gun, but through the sight glass on the platter you can see that the feed was increasing in size with centrifugal force normally

[murdock]

Today I have sprayed the 4 carburetors below and above the nozzles, tanks and covers with engine starters and nothing, there is no air intake.
So I'll wait for a capacitor that I need to change and the spark plugs to see what happens, listening carefully to the engine with an accelerated idle, does not sound round

[murdock]

New spark plugs and capacitors ok, it purrs like a cat, but remains the same, I suspect that it is the battery that is dead, I do not know if being depleted it removes intensity from the primary of the coil and that is the problem

[murdock]

after a while I still have the problem, the engine keeps failing,
new capacitors,
perfectly statically adjusted points,
valves with perfect gap,
revised coils, revised cables,
tapas not oem (but I don't think that's why it should fail),
test lamp between spark plug and wires in all 4 ok.

rebuilt engine,
pistons and rings + 0.50 with 150 km
069a carburettors,
factory settings,
statically synchronized,
synchronized butterfly valves,
38 and 99 jets
needle in second position,
floats in 22 mm,
no leaks or air intakes
oem air filter,
4a1 tubes with megaphone silencer,
mixing screw in 1 1/2
starts instantly and sounds very smooth
with the throttle grip marked when it reaches 1/8 it starts to stutter. if I accelerate quickly when cutting a small portion of black smoke comes out, black ollin spark plugs,
Could someone give me some advice on how to follow to find the reason for the failure?
Thank you

[Bryanj]

Another member on here had something similar and it was the new fuel pipe shedding small partivles internally blocking the jets

[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

[deltarider]

Black smoke, the first that comes to mind is unsufficient air. Maybe I have asked this before, but have you already tried with airfilter disconnected, to rule out a (partially) blocked air intake?

[murdock]

no lo he probado mañana lo are , el filtro no es nuevo ,no esta sucio , pero es muy viejo

I have not tried it tomorrow I will, the filter is not new, it is not dirty, but it is very old

[deltarider]

Just disconnect it and also that breather tube if that is still connected to the airfilter case, so you can also check what comes out of that breather tube.

[murdock]

quitare la tapa y el filtro de aire , el tubo del breather  , no esta conectado y  el de abajo de la caja tampoco tiene tubo y esta destapado ,
supongo que tambien probare con las mariposas a ver si mejora la combustion

I will remove the cover and the air filter, the breather tube is not connected and the one below the box does not have a tube and is uncovered,
I suppose that I will also try with the butterflies to see if it improves the combustion

gracias

[murdock]

delta , debo de darte las gracias , y una explicacion , cuando compre la motocicleta una de las primeras cosas que cambie aparte de la ingesta de aire original fue el asiento por uno plano , ahora al instalar nuevamente la caja de aire original quedan apenas unos 3 centimetros libres , encerrados entre el marco y el asiento , lo que no permitia una buena ingesta de aire , devi de darme cuenta antes , he quitado la tapa y el elemento filtrante , inmediatamente el motor sono a gloria

Delta, I must thank you, and an explanation, when I buy the motorcycle one of the first things that I changed apart from the original air intake was the seat for a flat one, now when installing the original air box there are only about 3 Free centimeters, enclosed between the frame and the seat, which did not allow a good air intake, I realized before, I removed the cover and the filter element, immediately the engine sounded glorious