SOHC.co.uk Forums > CB500/550
Cb550K 1978 Needle adjustment
Phteix:
Happy Easter everyone.
I'm trying to do some tunning on my carb, but I can't get the needle out. Do you have any idea how to reach the needle on this carb (see image)? I know that the arm-looking thing needs to come up removing the first bolt, and then? I tried to slide the part that connects together but did not work (red in the picture)...
Any tips would be very appreciated.
Cheers.
Bryanj:
Those are PD carbs and orrible to work on. I think you have to work on all 4 at once
deltarider:
I don't know what issue you're trying to cure. Me personally, I'd leave them alone. The effect will be little. Seen that you run pods, I'd concentrate on the main jets. Are the slow jets OK?
K2-K6:
I don't think you want to remove that pin.
Look down into the top of the slide and there are two screws, undo them on all carbs and you may e able to turn the lift mechanism fully out of the way to get the needles.
Are you adjusting for pods?
deltarider:
--- Quote from: K2-K6 on April 05, 2021, 12:03:17 PM ---I don't think you want to remove that pin.
Look down into the top of the slide and there are two screws, undo them on all carbs and you may e able to turn the lift mechanism fully out of the way to get the needles.
Are you adjusting for pods?
--- End quote ---
If your screws have been as firmly fastened (assembly) as in the predecessors of your carbs, be prepared. You will ab-so-lute-ly need a JIS screwdiver to unscrew and not ruin their heads.
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