SOHC.co.uk Forums > CB500/550

Carb float levels

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Neill C:
The carb is on the bench in a vice. I've tapped the bowl but still overflows. I'm beginning to think I'll have to set thr float slightly lower than the specified 22mm

McCabe-Thiele (Ted):
I would be thinking it's the float needle & seat.
I'd do what was suggested earlier & try to lap the seat before replacing it assuming the float is all good.

Oddjob:
Have you replaced the float needle and seat by any chance

Neill C:
Yes. Could the float just be slightly less buoyant than the others? They are 45 years old after all.

Oddjob:
It’s most likely the needle and seat, well known for aftermarket needles and seats to be sub standard compared to genuine brass. I’ve seen some where the point on the needle isn’t even central.

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