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-   -   fuel starvation (https://www.superhawkforum.com/forums/technical-discussion-28/fuel-starvation-17925/)

ghopki1 Mar 18, 2009 05:11 AM

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.....

nath981 Mar 18, 2009 05:57 AM

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

lazn Mar 18, 2009 08:27 AM

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.

ghopki1 Mar 18, 2009 10:46 AM

AHA, I will look closer tonight.

Thanks for your help guys.

jbaxx Mar 18, 2009 12:08 PM

Make sure the tank is venting properly as well. Did the shop tape or plug a vent line maybe?

maverick Mar 18, 2009 12:16 PM

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...

maverick Mar 18, 2009 12:22 PM

Ok I found that there should be a spring, now I just need to find it... lol

ghopki1 Mar 18, 2009 01:49 PM

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.....

Little_Horse Mar 18, 2009 03:22 PM


Originally Posted by ghopki1 (Post 206000)
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 :D.

maverick Mar 18, 2009 03:59 PM

glad to hear it man.

nath981 Mar 18, 2009 06:44 PM


Originally Posted by maverick (Post 205983)
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

maverick Mar 19, 2009 11:19 AM


Originally Posted by nath981 (Post 206064)
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.

nath981 Mar 19, 2009 05:01 PM


Originally Posted by maverick (Post 206180)
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

wcavasos Mar 28, 2009 10:40 AM

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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