Topic: 78 CB550 carb question

[straightpipez]

I'm trying to adjust the float level on my carbs (78 CB550, Keihin PD46C PJ). The problem or rather misunderstanding is that there is a tiny "holder" on the float arm tang that moves the shut off valve in and out of the passage. There is also a small plunger type thing inside the valve. So every time I move the floats, the valve moves with it because of the "holder".
How do I measure the float distance? And from where? The Clymer manual, uh, kinda sucks.

Confused? Ok good.

Also is the plunger supposed to move in and out of the valve? I assume so because all but one operates this way.

Any other secrets or tricks while in there?

Thanks.

[Jay B]

Yup, the plunger is supposed to move in and out. You want to set the float level at the point where the tang on the float just touches (begins to move) the plunger.

[TwoTired]

The float valve should be seated and the little plunger should be at full extension when the float tang makes contact with it.
It is a bit easier to make this adjustment with the carbs on their sides.

Do you know the float height is 12.5 mm? for your carbs?

Cheers,

[straightpipez]

I know it's 12.5mm now! Thanks!

Just ordered all the gaskets and a new valve.