Topic: CB500 Petcock question

[brett_bike]

It seams that the fuel flowing from my petcock is not the same in both fuel lines.  I noticed this as I was pulling my tank off again today to try to sync my carbs again.  I had it switched to off but I drained a little fuel into a glass jar to check for contaminates when I noticed one tube was flowing pretty freely and the other was just a drip.  Everything appeared to be clean and carb cleaner squirted through it when sprayed in every opening.  I recently installed a rebuild kit, the lever moves with moderate force and I have no leaks.  Is there a wrong way to install this kit?  My bike is a 1973 CB500, the petcock has two fuel lines that come from it, one goes to #1-2 and the other goes to #3-4.

Obvious question; Yes, there was enough fuel in the tank as to not have to be set on reserve.

Lately I've had issues with the bike stumbling on take off from idle to 1/4 throttle, and a little blubbering at cruising speeds.  I wonder if this might have anything to do with that if the flow of fuel can't keep up the amount being used.

[TwoTired]

Let me guess the pipe that flowed was the one closest to the valve.
That's the first one the fuel exiting encounters.  If you plug the end that first outlet, does the other one flow?

It's a log manifold and gravity has its effect on the first opportunity to let the fuel fall.

[KCRSXTypeS]

It seams that the fuel flowing from my petcock is not the same in both fuel lines.  I noticed this as I was pulling my tank off again today to try to sync my carbs again.  I had it switched to off but I drained a little fuel into a glass jar to check for contaminates when I noticed one tube was flowing pretty freely and the other was just a drip.  Everything appeared to be clean and carb cleaner squirted through it when sprayed in every opening.  I recently installed a rebuild kit, the lever moves with moderate force and I have no leaks.  Is there a wrong way to install this kit?  My bike is a 1973 CB500, the petcock has two fuel lines that come from it, one goes to #1-2 and the other goes to #3-4.

Obvious question; Yes, there was enough fuel in the tank as to not have to be set on reserve.

Lately I've had issues with the bike stumbling on take off from idle to 1/4 throttle, and a little blubbering at cruising speeds.  I wonder if this might have anything to do with that if the flow of fuel can't keep up the amount being used.

I have a 73 500 as well, had a similar problem on my BRAND NEW petcock.  Couldn't figure out why my bike kept dying.  I just pulled the petcock, completely disassembled it, cleaned it and found boogers and snot in there, put it back together and both nipples flow perfectly now!

[rpauli75]

KCRSXTypeS; just today i discovered this same problem, were you able to somehow clean the manifold between the two outputs on the bottom of the petcock. It seems this is where my problem is even though i can get carb cleaner and air through both sides. The rest of the valve is now clean and in surprisingly good shape.

I know its been sometime but considering this post covers my exact issue it didn't seem worth starting another petcock topic.