pingel petcock needs vaccum?

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Myxomatosis

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hey guys, I am still having problems with my new rebuilt petcock or rather vacuum issues.. with 2 vacuums coming from the carbs it is still fuel starved. I am hoping to bypass the fuel starving problem by bypassing the vacuum entirely.. does the cheaper pingel petcock available on the zl store need vacuum from carbs to work? i know the more expensive one says it does. if not i hope i can use the pingel then cap all the vacuum ports and ride this spring!
 
There is a vacuum pingle model but most just go with the manual pingle. I would look into if you are really fuel starved or if its something else. Adding another vacuum line does nothing, its a signal without flow. One is the same as 20 when coming from the same source.
 
Honestly im not sure what it is, the carbs are rebuilt, new petcock, tank is venting.. The bike runs but after a while on the highway gas stopps flowing, i pull over and squeeze the fuel line a few times and gas starts flowing again. I hoped a manual petcock would let the gas flow.
 
Is the inside of the tank clean? Some shmutz may be clogging the line. Make sure the line is headed "downhill" the whole way....If there is a dip, it could be just enough resistance to slow the flow rate down...maybe.
 
I tried that, put new line in, and same problem with taking apart and checking carbs and petcock. This is 3rd petcock, new one from markus. I thought maybe a leak in the carbs, but im so tired of replacing parts i just want to bypass the vacuum completely. Ill deal with the bigger prob later, right now, i wanna ride my beast
 
Oh and i extensively cleaned the tank, spent months on that. Electrolysis, muriatic acid, multiple cleanings and resealed before use. Ugh.
 
How do you know the tank is venting? Sounds like it isn't. If it is, the first thing that comes to my mind is a clogged petcock screen, but you said all of that was replaced so the next thing on my mind is an air bubble in the fuel line.
 
Thanks for the response, i know because i drilled open the vent, and also has the same problem with gas cap off. A bubble in the line is possible,would this really cause itand how do you rid bubbles in the line?
 
gosupes said:
There is a vacuum pingle model but most just go with the manual pingle. I would look into if you are really fuel starved or if its something else. Adding another vacuum line does nothing, its a signal without flow. One is the same as 20 when coming from the same source.
Click to expand...

I tried vacuum lines from the #2 carb and other carbs, then tied those multiple into 1,to the petcock. I was told that the other carbs should have vacuum as well so i tried this. Thanks for the help everyone
 
Does running the bike on the prime position or switching to that position once your riding do any good? Later.
 
Do you still have the emission tubing hooked to the tank? Cali or 49 state tank?
 
If it doesn't flow on prime then the problem is in tank or petcock. Prime is gravity fed. Next time it doesn't flow on prime pull the line off carbs to be 100% sure there's no flow. Don't sound right. Hook up the lines from the carb the way they are supposed to be. #1 and #4 should be teed in together and runs up under frame to the emissions crap if I remember correctly. Then if I'm not mistaken, #3 should be capped and #2 goes back to petcock. Someone who knows with certainty can chime in here to verify but I wouldn't go switching things around. Once this is correctly hooked up, then you can properly diagnose issues. Boz
 
Are you using an inline filter? I have had those symptoms from a partially clogged filter. When the bike stops running what happens sudden stop or running bad then dying?
 
Yes i am using an inline filter but it is brand new. The carbs vacuum lines were in as described, i added a second line from#4 and #2 and have the same problem. I know it does not make sense to me why it would still do it on prime. Since i have checked everything else, im starting to think maybe its clogged down where the fuel line meets the black plastic splitter that feeds the carbs, have not checked that and i think that would cause these symptoms
 
I think i will recheck my petcock filter, put in a new inline filter, check carbs for leaks, then try to clean out the black plastic splitter, put vacuum lines back to original, and then give it a ride. If this does not work, i think i will jump off a bridge in frustration. That should do it. Or try the pingel.
 
As for the emissions tubing, it is not a california model, and i am not sure what is meant by emissions tubing. Im new to this bike so have not learned everything yet, anyone have a pic of this tubing?
 
Myxomatosis said:
The carbs vacuum lines were in as described, i added a second line from#4 and #2 and have the same problem.
Click to expand...

I'm not following what you're saying here.
#1 and #4 are connected at a "T" which runs up to the front of the bike above valve cover to emission equipment. #3 should have a black plastic cap on it and #2 runs to the petcock. Do not add lines, do not take any away.

As for the black plastic that the fuel line hooks into: that feeds the bowls which in turn raises the floats. I highly doubt that's clogged but anything is possible. It could be partially clogged allowing you to run off of what's in the bowls but not feeding in fast enough to keep up with whatever the engine is drinking. It is possible but not probable. I tell you this just in case you decide to blow compressed air in there.

I do know on ZLmark's bike he had a problem with a clogged choke tube. Again, very rare occurrence but DEFINATELY possible. Hope this helps, Boz

For clarification purposes: as you sit on the bike, carb 1 far left, carb 4 far right. They run in order 1,2,3,4
 
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Bozang1 said:
I'm not following what you're saying here.
#1 and #4 are connected at a "T" which runs up to the front of the bike above valve cover to emission equipment. #3 should have a black plastic cap on it and #2 runs to the petcock. Do not add lines, do not take any away.

As for the black plastic that the fuel line hooks into: that feeds the bowls which in turn raises the floats. I highly doubt that's clogged but anything is possible. It could be partially clogged allowing you to run off of what's in the bowls but not feeding in fast enough to keep up with whatever the engine is drinking. It is possible but not probable. I tell you this just in case you decide to blow compressed air in there.

I do know on ZLmark's bike he had a problem with a clogged choke tube. Again, very rare occurrence but DEFINATELY possible. Hope this helps, Boz

For clarification purposes: as you sit on the bike, carb 1 far left, carb 4 far right. They run in order 1,2,3,4
Click to expand...

Thanks, i think when i first got the bike,#1 and #4 were connected to each other. Does anyone have a pic of how these join into a "t" and where this leads to the emission equipment?
 
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