Got her put back together and... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Carbs and Fuel System
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post #1 of 19 (permalink) Old 09-25-2012, 05:25 PM Thread Starter
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Got her put back together and...

Spent part of yesterday getting the bike put back together. She got new header gaskets, new spark plugs, new tank rubber, and a new AGM battery. All is well, until I noticed a bit of gas leaking from the pet cock. I did take the back side off just to see the condition of the vacuum valve. The gas is not leaking from where the pet cock mates to the tank. So, my guesses are either I tore the the seal or I did not tighten the cover well enough. Hopefully, it is the second guess. Possible other guesses I might have over looked?

Over all, she runs a lot smoother than before on the old wet-cell. The new header gaskets made a difference in tonal qualities as well. Still has a significant vibration. When I had her on the center stand, I cranked the rpms up and she would scoot around the garage floor. So, maybe the dampeners are going. But, the handle bars hardly shake like they used to. Nor do I feel much thru the foot pegs.

Since the new to me gas tank is flat black, I feel compelled to finish the rest of the bike in the same color. Maybe during the winter, I'll try doing a rattle can job.

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post #2 of 19 (permalink) Old 09-25-2012, 05:47 PM
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I would think that when you took the pet-cock apart you prob rotated it putting it back together. There is a tiny nipple that aligns it back together, if it is not in the slot it will leak, been there ,done that!!!!!

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #3 of 19 (permalink) Old 09-25-2012, 06:09 PM Thread Starter
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Quote:
Originally Posted by romeobravo172 View Post
I would think that when you took the pet-cock apart you prob rotated it putting it back together. There is a tiny nipple that aligns it back together, if it is not in the slot it will leak, been there ,done that!!!!!
Never noticed that. I bet you $$$ that's what I did. Will the petcock flow gas while I fix that part?

EDIT: Silly me, of course it won't flow with the valve turned off.

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Last edited by blazblu82; 09-25-2012 at 06:11 PM.
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post #4 of 19 (permalink) Old 09-25-2012, 06:15 PM
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Yes, it will flow fuel, but it will leak, mine got worse over time until I took it apart and realized that I had not lined up that little tit in the right spot. Put it back together corectly and no more leakage! Is surprising how little that thing is, way to easy to miss!!!

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #5 of 19 (permalink) Old 09-25-2012, 06:38 PM Thread Starter
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Originally Posted by romeobravo172 View Post
Yes, it will flow fuel, but it will leak, mine got worse over time until I took it apart and realized that I had not lined up that little tit in the right spot. Put it back together corectly and no more leakage! Is surprising how little that thing is, way to easy to miss!!!
I'll just wait till the tank is near empty then. It is a PITA trying to drain fuel from the petcock.

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post #6 of 19 (permalink) Old 09-25-2012, 06:48 PM
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Siphon the gas out, can get it low enough to take the pet-cock out of tank, and dont have to remove tank to do it. Is not a big project, I just hate the smell of raw fuel underneath my butt!!

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #7 of 19 (permalink) Old 09-25-2012, 07:04 PM
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i just ran my bike down to reserve then layed it on the right side on the grass so as not to scratch anything and did the job that way

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post #8 of 19 (permalink) Old 09-25-2012, 10:26 PM Thread Starter
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Finally found a length of hose to siphon the gas with. Prolly take an hour or so to drain; but, whatever. Also, what is the trick for getting the fuel lines back on the petcock? I spent a good half hour trying every which way before I finally got them on. Thanks.

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post #9 of 19 (permalink) Old 09-25-2012, 10:48 PM
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Really should not take long to drain tank, but it is what it is. As for fuel lines a pair of long needle nose pliers does fine, small fingers will work too, just got to hold your mouth just right, patience helps!

04-3,200 miles bought July 2011 with 928 miles. Loaded with acessories to many to list here, see my albums for more details! I also make a custom tank bib specific for the 750 if anyone is interested, ck my albums for some pics.
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post #10 of 19 (permalink) Old 09-25-2012, 11:24 PM Thread Starter
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Quote:
Originally Posted by romeobravo172 View Post
Really should not take long to drain tank, but it is what it is. As for fuel lines a pair of long needle nose pliers does fine, small fingers will work too, just got to hold your mouth just right, patience helps!
Just finished checking everything out and putting it back together. I did ot find anything wrong with the petcock. It was aligned as it should be. However, I did not the 4 screws for the housing were rather easy to remove; so, I tightened them as tight as I could.

As for re installing the fuel lines, I found that if I hold the tank in my left arm and use my right hand, I can get the fuel line slipped on fairly easily. I also found surface rust where the petcock mates to the tank. Took a rag and some PB Blaster and rubbed it off.

Hopefully I fixed the leak. I'll be checking here in a little while.

Thanks for the tips!

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