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Cb 550 ss spain

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murdock:
A long time I have worn marks on the throttle , many times I have run at different speeds and stopped to check the spark plugs , and many times I have been close to what works well throughout the range , but every time I go back out on it responds differently , because it is hot , because it is cold , because it is going to rain , because it is very early , etc , we all know that it is not a carburettor battery easy to remove , it is not like a Guzzi for example which you can disassemble a whole dellorto without removing it from the bike , I got tired of not being able to enjoy the bike , I will put back the original box to see how it behaves , and I will think if someday I try it again

murdock:
Ok, I have all the jets saved, but the needles are still on the bike, I thought they had 5 notches, I don't remember now, maybe I'm confused with other needles I have at home.

murdock:
My needles have 5 positions, they are 273004 I think they are the correct ones for the model 550 ss from 1977 with 069a carburettors, so I am confused, in which position should I place the clip, in the manual it specifies the second one, but does not specify whether to bottom up or top down

deltarider:
Honda always determines the clip postion from top. Actually I am surprised the 273004 needle has five slots, so I have to investigate wherever I got that idea. Anyway, Honda is clear about the position: 2nd from top. But... I don't think the issues you experience, have much to do with a jet needle being one notch higher or lower. But that's just an opinion.

murdock:
Well today again my my motorcycle has let me down, I have replaced the original filter box with its original jets, 38 and 98, the original needle in its original diffuser, in the second notch from top to bottom 22 mm at the level of 1/12 float in the mixture, adjusted the points in the F, cleaned the spark plugs, and it does not run well,
At 1/4 throttle the grgrgrgrgrgr begins and it does not lift up until I exceed half the throttle, but they do not stop completely, it has improved a lot to 1/4, but nothing else, the carburettors were synchronized on the bench, both in total closure as in total opening, the only difference with the originality is that the air box inlet does not have a rubber elbow and that the exhaust silencer is a short megaphone with fiber inside
I have not sprayed the carburettors for leaks yet, but I know that in carburetor number 2 one of the four tank bolts is not tightening.
Could it be a spark plug failure? At idle I have loosened the cables one by one and in cough the change is heard, it may be that the battery is completely dead, I don't know what to do anymore, I thought everything would return to normal

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