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The actual fuel hight in these 550 K3 Carbs

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nairb:
I have been trying to find if Honda ever said what the fuel height should be in the carbs of a CB550 K3.

Honda does say how far the float should dangle down ....  22mm I think.

But on my KZ750 twin I use a clear tube stuck in the bottom of the carb bowl and this gives the actual fuel height, As shown in the pic below.

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And Kawasaki says what the fuel level lines up with.  All very helpful.

Does anybody know if honda ever did this for the 550 K3.  I now need to check the float heights .... It would be interesting to try this with the carbs still on the bike.

Ta
Nairb

Bryanj:
No they didnt and i dont think 22 is correct, there are 2 different settings for K3 but cant remember what differences are, the K3 addendum should be in Ashs dropbox

deltarider:
It's either 12 or 14mm, depending on model. See addendum CB550K3.

nairb:

--- Quote from: deltarider on May 20, 2026, 07:52:31 AM ---It's either 12 or 14mm, depending on model. See addendum CB550K3.

--- End quote ---

I took the 22mm number from the "Honda CB500_CB550 Four Service Manual"........   See pic below

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But its not for the K3.  I will check the addendum CB550K3.

McCabe-Thiele (Ted):
The 22mm figure is an upside down  height from the carb body to the bottom of the float, , not the depth of petrol in the bowl.

That's my understanding.

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