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Float Valve and Pilot Jet Replacement Needed?

DaveP

Forum Mentor
IMG_4319.JPG

First carburetor rebuild on a 1981 GS650. Have only taken apart and cleaned carburetor #1 so far.

Red circle: The float valve plunger does not depress at all. Does it need to be replaced or do something other than dipping?

Green circle: The pilot jet has been dipped for almost 3 hours, but the hole in the tip is still completely clogged. Can't get a wire to go through. Time to replace or dip longer?

Thanks,
Dave
 
Tap the pin in the red circle, it will probably free up.

Use a finer wire in the end of the jet. I use a single strand in a multi-strand electrical wire. I have two sections of wire to poke though the holes in jets. One section has thicker wire strands that I use in the side holes of that jet, main jets and the emulsion tubes. The other section of wire has finer wires, but more of them, and I use that only for poking the end holes.

.
 
Soak the parts longer. Over night at minimum. The needle will free up, as will the gunk plugging the jet.
 
The needle will free up in a few seconds if you hit it with spray carb cleaner.
 
A quick soak in spray carb cleaner did the trick on the plunger. I am surprised that a few hours in the parts cleaner did not have the same effect.

For the pilot jet, I have the wire cleaner set from K&L. http://www.bikebandit.com/k-l-carb-cleaner-kit There are various sizes of wires in the set, but none are specified. Not sure how these compare to some of the other wire suggestions.

Heading out for a couple of days for Memorial Day Weekend, so won't try the longer soak on the pilot jet until I get back.
 
Why not soak it the whole time you're gone?

It won't hurt the brass at all.
 
I left some jets and things in the dip for about six months, it didn't hurt them at all.
 
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