SOHC.co.uk Forums > CB500/550

550f running rich?

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exvalvesetdabbler:
I used  genuine parts, this was done around 2010.  No reason to doubt the origins of the originals since I have had the bike since 1980 with only 18k on the clock at the time.

Regards
Dave.

DomP:
With this in mind might it be worth trying my needle clip one lower, which on an F will be the last position.?  All of my parts are genuine Keihin and correct for carbs/bike

florence:
Sorry if you have tried these things already.

I'm assuming you have had the carbs set up and balanced.

Are the chokes opening fully?
Is it flooding, are the float heights correct?

DomP:
Yeah I've ve had the carbs off, set float heights, bench synced,  balanced etc.  I must be missing something though

taysidedragon:

--- Quote from: DomP on October 14, 2025, 10:18:19 AM ---With this in mind might it be worth trying my needle clip one lower, which on an F will be the last position.?  All of my parts are genuine Keihin and correct for carbs/bike

--- End quote ---

If you put the clip one groove lower that will raise the needle and make it run richer.

Try going the other way, put the clip one groove higher to lower the needle.

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