SOHC.co.uk Forums > CB500/550
Carb float levels
Oddjob:
If it comes out and isn't pinned in place it can move DR. They ain't a tight fit, I can pull them out with my fingertips. As they are made of brass they are also easily bent.
Neill C:
I have previously polished the pins. I push them out with a piece of stiff wire. If it overflows again I'm going to remove it to see if it's bent as that would make sense.
Multiman:
I had problem with overflowing carbs that had just been cleaned and rebuilt using new brass float needle valve seats.
After a lot of cursing it turned out that the new brass wasn't the same dimensions as the old brass and therefore the o-ring wasn't sealing properly
I put some old brass in and the torrential overflow problem stopped straight away, so maybe check the valve seats are all the same?
Old on left, new on right. O-ring groove at slightly higher position on the new.
Neill C:
That's very helpful. Thanks. Maybe it seeps past the o ring with the vibration of the engine.
deltarider:
--- Quote from: Oddjob on March 20, 2023, 03:55:16 PM ---If it comes out and isn't pinned in place it can move DR. They ain't a tight fit, I can pull them out with my fingertips. As they are made of brass they are also easily bent.
--- End quote ---
IIRC, when the carb is assembled, like in normal daily use, the design of the bowl prevents the pin coming out.
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