Leaking from petcock after rebuild - Page 3 - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #21 of 49 (permalink) Old 06-25-2019, 12:23 PM Thread Starter
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Heres a link

https://www.partzilla.com/product/kawasaki/51023-1392

Expensive, yeah a little. But I bet it wont leak. Id rather keep the highly flammable gas in the bike.
That's cheaper than ebay, actually! If I can't get my old one to work, I will get this. I got douched with gas while pushing the bike home last night. Not fun.
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post #22 of 49 (permalink) Old 06-25-2019, 12:30 PM
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I believe we are talking about two different o-rings. I installed the new 92055, that is behind the selector (fits in the grove on the back side) that came with the kit. It was the 607 o-ring that I do NOT have, nor did I see it when I disassembled the petcock. Unless we are talking about the same thing. The 607 looks like it is on the back side of the housing, facing the engine. Please correct me if I am wrong. I love teachable moments.
670 is the one that came already installed on my new diaphragm. It goes on the metal 'piston' in the center.

The top of the petcock where it meets the tank, gets an o-ring in the shape of an open oval, or the oval with two bars across it.


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post #23 of 49 (permalink) Old 06-25-2019, 01:08 PM
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Quote:
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Quote:
Originally Posted by mmart View Post
Here’s a link

https://www.partzilla.com/product/kawasaki/51023-1392

Expensive, yeah a little. But I bet it won’t leak. I’d rather keep the highly flammable gas in the bike.
That's cheaper than ebay, actually! If I can't get my old one to work, I will get this. I got douched with gas while pushing the bike home last night. Not fun.
That site has been the cheapest for most OEM stuff I’ve found. Searching EBay makes me tired sometimes lol. Too much, never sure of quality. I’m sure many swear by it but I’ve gotten some crap.
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post #24 of 49 (permalink) Old 06-25-2019, 01:10 PM Thread Starter
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I did not have that square gasket


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post #25 of 49 (permalink) Old 06-25-2019, 01:17 PM
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I did not have that square gasket


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So you're missing the 670 o-ring and the gasket? That's a problem.

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post #26 of 49 (permalink) Old 06-25-2019, 01:23 PM Thread Starter
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Leaking from petcock after rebuild

If the 607 is the little 1/4 one, I have that, but I do not have the square one (not the diaphragm). Heres the kit I bought that said it fit. https://www.ebay.com/itm/Kawasaki-EX...-/323611864805


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'86 VN750 with the following work done to it, after sitting for 19 years:
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REV 2:9
REV 3:9
www.voat.co

Last edited by MSattler; 06-25-2019 at 02:06 PM.
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post #27 of 49 (permalink) Old 06-25-2019, 04:41 PM
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Are you able to determine where it's leaking from?

The pic in that listing looks like there's another gasket under the diaphragm, but they don't give a parts list in the ad.

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__________________________________________________ ____________
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post #28 of 49 (permalink) Old 06-25-2019, 04:44 PM Thread Starter
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I am reaching out to the seller. So the diaphragm has two pieces to it. My original concern was I had installed it backwards on the plastic piece. Seeing the two videos, it appears I had installed it correctly. My reasoning for thinking I installed it backwards, is that fuel is flowing unrestricted from the petcock, regardless of the position of the selector.


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REV 2:9
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post #29 of 49 (permalink) Old 06-25-2019, 04:58 PM
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I was under the impression it was leaking onto the ground. The post about 5 blocks/3 blocks made me think this.

The picture I posted earlier, was to show the oval ring with the bars. It's just a google pic, the actual kit may be for a different bike.

According to the diagram in post #14, there's no gasket.

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__________________________________________________ ____________
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post #30 of 49 (permalink) Old 06-25-2019, 05:16 PM
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Yep that's expensive. But they also have all the parts necessary to rebuild the old petcock for a lot less. None of the other places I looked had all of them. I think I'll go ahead and order all of the rebuild parts. Ethanol gas tends to destroy the rubber parts over time. I think it is best to not move the petcock. I know how far a Vulcan 750 will go on a tank of gas. I'll jut put in on ON and leave it there. Seems like turning the petcock after ethanol has softened the rubber could damage it.

The fuel gauge stays on full for a long time (about 60 miles, then starts dropping. When it reaches the halfway point, it starts dropping like a rock. I would not go much past 100 miles before filling up the gas tank. I have been places where I had to carry an extra gallon in the saddlebags.
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