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fuel starvation

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Old 03-18-2009, 05:11 AM
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fuel starvation

Just checking for ideas here but:

Got my bike back from the paint shop yesterday. I was pulling out into the road and it died. I rolled it back over and we checked the fuel cutoff under the tank. We noticed a vaccum line off and reattached it. Without this it would not allow fuel out of the lines. It started up and idled perfect after that but about 8 miles later on the way home it started to sputter. If I give her full throttle it clears up slowly. The only thing that I can think of is a vaccum line or something that could be clogged.

I would take it back to the body shop but if it is simple I would rather do it myself. I do not have much faith in there ability to diagnose mechanical issues.

What do you think?? It would have to be something around the tank or fairings that they took off.....
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Old 03-18-2009, 05:57 AM
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to where did you reattach it??? common mistake is to look under tank and see the hose attachment stem pointing straight down or perpendicular to the tank bottom. This is not the correct attachment point for the vacuum line that travels along the left side with the left side fuel line. the correct connect point is difficult to see and is located on the left side of the petcock parallel to the tank bootom.

thanks, Nathan
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Old 03-18-2009, 08:27 AM
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Yep as Nathan said, PLVIR is the most likely issue.

To clarify: the nipple on the bottom of the petcock should have nothing connected to it... The vacuum line actually goes to the one on the back.
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Old 03-18-2009, 10:46 AM
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AHA, I will look closer tonight.

Thanks for your help guys.
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Old 03-18-2009, 12:08 PM
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Make sure the tank is venting properly as well. Did the shop tape or plug a vent line maybe?
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Old 03-18-2009, 12:16 PM
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You know, this thread made me go check on my petcock, and the vacuum line was on the wrong spot. Then I decided I may as well check my diaphragm while I was there, and I think I dropped something! Is there a diaphragm spring that I dropped? It seems like there should be...
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Old 03-18-2009, 12:22 PM
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Ok I found that there should be a spring, now I just need to find it... lol
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Old 03-18-2009, 01:49 PM
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PERFECT guys. She runs like a new bike now.... We hooked it up to the wrong nipple.

And my wife say's these forums are worthless.....Hmmmffff.....
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Old 03-18-2009, 03:22 PM
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Originally Posted by ghopki1
PERFECT guys. She runs like a new bike now.... We hooked it up to the wrong nipple.

And my wife say's these forums are worthless.....Hmmmffff.....
not this one .
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Old 03-18-2009, 03:59 PM
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glad to hear it man.
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Old 03-18-2009, 06:44 PM
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Originally Posted by maverick
Ok I found that there should be a spring, now I just need to find it... lol
are you referring to the carb diaphram? It would be hard to lose that spring because it's very long. there's some tricks to getting them back in.

thanks, Nathan
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Old 03-19-2009, 11:19 AM
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Originally Posted by nath981
are you referring to the carb diaphram? It would be hard to lose that spring because it's very long. there's some tricks to getting them back in.

thanks, Nathan
No, I was referring to the spring in the petcock.
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Old 03-19-2009, 05:01 PM
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Originally Posted by maverick
No, I was referring to the spring in the petcock.
oh! it's good you found it. I hate that when that happens. I was going to take mine apart but the screen didn't want to come out of the tank with average pulling so I let it be.

thanks, Nathan
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Old 03-28-2009, 10:40 AM
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when I put my tank back on after jetting the carbs, I had put the hoses on wrong and the bike did not run at all, I wasn't getting any fuel at all, but luckily one of my friends figured it out pretty quick.
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