XS750 Float Needles

[IanDMacDonald]

QUESTION:
Mikuni float needles vs K&L float needles: Should the needle compress all the way down? The K&L does, the Mikuni stops about 3/4 down.

After a nice Triple clean in the ultrasonic cleaner, got the carbs back together, synced, and it ran pretty good. After a few runs & tuning, put the bike on the side stand and it conked out. Looked down and saw fuel running out of the air box. Obviously the float needles are sticking.

[Radioguylogs]

Don't know the right answer to your question, but all of my bikes have K&L needles and I don't have any problems. I set the floats according the FSM (float weight pushing down on the spring).

Maybe it doesn't matter?

I know you have enough experience to find the problem. Maybe float is tight on the float pin....maybe to float bowl gasket is interfering with the float movement....maybe a piece of dirt got in there...etc.

[bikerphil]

It shouldn't matter as long as all the floats are equal height.

[DEEBS11]

Brass floats? Could have a breech.

[oldyam80sg]

Also make sure the float seat is clean.

[IanDMacDonald]

Brass float had a leak. Replaced the seats for shiggles.

[DEEBS11]

I have had success with repairing leaky brass floats with an electronic solder station & liquid flux. All fuel must be drained and the brass must be cleaned. I use a Dremel with a brass wire brush. The solder will add a small amount of added weight so I add about 1mm more to the float height.