Good news and bad news.

So, after taking you's guys's advice, I rebuilt the carbs. I had no idea it would be that easy! Got the carbs back in and it runs like a champ. Needs a definate carb sync but runs good regardless. I was riding it around the block just to see if it was missing under load, and nope.

Bad News is after I parked it, I noticed gas coming out of carb #4 on the air box side. I have an idea of what this might be because that float pin was quite the bear to get out, and I kind of mangled the pin on its way out, but it came out. I ordered a new one from Chacal and it seemed a little loose. You can push it out with your finger even after tapping it in. So, I am figuring something came loose while riding it.

So, does anybody have any ideas to make the pin stick? If thats the case even, I don't have time to take it all back apart tonight but I need to ponder this just in case.


Thanks,
Nick

 

I don't think they have to stick in place.... I think that the bowl holds the pin in.

Sounds like you may have bump the float and raised it's level in the bowl. Might want to check that too while you got it apart.

 

The Bowl is designed to NOT allow the PIN to "Fall out"

Clean and Polish the Float Valve.
Roll 2500 Finishing Paper into a tight roll
Cut the Bottom flat.
Twist it inside the Float seat.

Revisit the Float Height.

Observe the Geometry of the Pin and Wire Guide.
If the Float Tang is causing the Pin to hang c0ckeyed, ... swap the wire to the other side of the tang and see if that helps.

 

what exactly does the float valve do? It might help a little if I understand what is going on inside of these little contraptions a little better.

 

The float valve allows the gas in to fill the float chamber to the proper level, and then shuts the fuel supply OFF until the level of gas in the float chamber drops! Follow the two suggestions above and check your float level ect. 81'XJ 750 SecaR, grunt 007, Mi.

 

Ahh, thank you for the explanation. Everything makes so much more sense now. She will come back apart tomorrow.

 

ditto what automotivated said. i'm learning more and more about these carbs while trying to fine tune 'em. thanks grunt007

 

nThink of your needle/seat/Float like the float valve in a toilet

When you flush the toilet the water leve in the tank falls, as this happens the rubber ball falls which opens the water valve allowing the tank to fill. As the tank reaches full the rubber ball floats and shuts the water off.

The float in the carb falls as the engine uses the gas in the bowl. The needle is connected to the float. The needle opens gas flows in refills the bowl...

If the float is low the bowl wont fill all the way resulting in a lean condition as the main jet wont stay covered in fuel. The opposite is true of high float which makes rich because the bowl over fills, covering pilot jets, emulsion tubes, etc introducing excess fuel in those circuits. .

Hope this helps you understand whats happenin' in your bowls, Yo

Jay

Ps i typed ALL that on my Android phone!