Overflowing Carb

[MrJoebly]

Just pulled the carb on my 04 FZ1. It was overflowing when running, replaced all 4 float bowl gaskets, replaced the needle valve and seat on all 4. And checked the float height and adjusted them all. Put it back in, now #2 carb is the only one overflowing. Didn't think about it until just a few minutes ago, but gonna give it a few taps to see if the float is stuck. Any other suggestions? Saw something about possibly replacing the petcock diaphragm? Or am I stuck pulling them again and try redoing #2 again?

 

[Whip!]

Probably gonna end up pulling 'em again. Gotta be something with the float or valve. check the o-ring on the float valve seat. That's usually where I've found leaks. I put those in with a little Vasoline to help the o-ring from pinching or rolling.

 

[justpassinthru]

No need to reinstall the carbs to see if they are going to leak, turn them upside down and check with a Mitivac to see if they hold pressure. If one fails to hold 2 to 3 lbs of constant pressure, it's going to leak fuel. I check them before putting the bowls back on. A leak can easily be found then with soapy water and a spray bottle.

 

[Whip!]

No need to reinstall the carbs to see if they are going to leak, turn them upside down and check with a Mitivac to see if they hold pressure. If one fails to hold 2 to 3 lbs of constant pressure, it's going to leak fuel. I check them before putting the bowls back on. A leak can easily be found then with soapy water and a spray bottle.

Good thinkin. Ima start doing that.

 

[SEKAF]

I believe there is a certain o-ring that needs to be replaced. This is from Pats FZ1 page. Scroll down to addendum III. https://cartestsoftware.com/fz1/jetkitinstallation.html
They are float needle o-rings. only last so many years. Notorious for leaking carbs. Pats FZ1 page told me to order a packet of o-rings which I did. Just have to pull carbs and attack the project. Good luck