Leaking Petcock - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 04-01-2017, 08:04 PM Thread Starter
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Leaking Petcock

Hey guys!
New to this site, but was so excited when I found it. I just picked up my first VN 750 a couple weeks ago. It's an 01' with 20,000 and everything runs great, except for the leaky petcock. I have attached a couple photos of the plastic bit that holds the vacuum plug. If you can see it there is a small factory made hole in the plastic bit that runs from the center and out one of the sides. When I start up the bike this hole sprays out gas. Any thoughts? I'm hoping all I need is a rebuild kit. Thanks everyone!
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post #2 of 9 (permalink) Old 04-01-2017, 09:30 PM
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There are more than one place where you can get replacement parts. One is "CheapCycleParts". I believe they have an illustrated parts breakdown for the petcock in the Fuel Tank 1/3 section. I don't know where they stand in relation to other places price-wise but I've always had good luck with them.

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post #3 of 9 (permalink) Old 04-01-2017, 10:05 PM
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The diaphragm is shot. Might see some holes in it if you hold it up to a light and flex it.

Got mine off ebay but it was still about $22, if I recall.

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post #4 of 9 (permalink) Old 04-01-2017, 10:52 PM Thread Starter
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Originally Posted by Spockster View Post
The diaphragm is shot. Might see some holes in it if you hold it up to a light and flex it.

Got mine off ebay but it was still about $22, if I recall.
I'll take a look at that. Thanks!
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post #5 of 9 (permalink) Old 04-01-2017, 11:00 PM
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I'll take a look at that. Thanks!
Make sure you're getting the whole rebuild kit with the diaphragm/piston. Some people just sell the smiley face rubber gasket and that's not what you need.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
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post #6 of 9 (permalink) Old 04-01-2017, 11:16 PM
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Good luck. Your other option (you may already know about and have purposefully skipped) is to save a few bucks over the kit and just get a manual TW200 petcock and use a T since its only one output.

I did that cause I'm cheap, simple and its not vacuum operated. OEM tw200 petcocks are $17 shipped for the whole thing + T. the $8 chinese ones are supposed to be junky.

Enjoy your 'new' bike!

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post #7 of 9 (permalink) Old 04-02-2017, 07:05 AM Thread Starter
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Quote:
Originally Posted by gidaeon View Post
Good luck. Your other option (you may already know about and have purposefully skipped) is to save a few bucks over the kit and just get a manual TW200 petcock and use a T since its only one output.

I did that cause I'm cheap, simple and its not vacuum operated. OEM tw200 petcocks are $17 shipped for the whole thing + T. the $8 chinese ones are supposed to be junky.

Enjoy your 'new' bike!
I have been debating this option. With that option I would simply cap off the vacuum instead of letting it run to the petcock, correct? This is my first bike that has functioned with a vacuum to the petcock so its a bit foreign to me still. As far as the mechanics of it goes I don't see why more people wouldn't go that rout.
Have you found any issues in capping off and modifying to a vacuum-less petcock?
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post #8 of 9 (permalink) Old 04-02-2017, 12:46 PM
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yes just cap it off

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post #9 of 9 (permalink) Old 04-02-2017, 05:19 PM
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Quote:
Originally Posted by Josh Elke View Post
I have been debating this option. With that option I would simply cap off the vacuum instead of letting it run to the petcock, correct? This is my first bike that has functioned with a vacuum to the petcock so its a bit foreign to me still. As far as the mechanics of it goes I don't see why more people wouldn't go that rout.
Have you found any issues in capping off and modifying to a vacuum-less petcock?
No - works. closest thing to an 'issue' is just hose size. OEM metric hoses are pretty big, too big for the TW200 barb. I used stretch semitranslucent hose that fit over the barb and oem carb barbs too.

Some people erroneously think the single petcock would somehow restrict fuel flow, no, and this isn't a space shuttle we are talking about gravity pulls in volume way faster than the engine can burn it. No performance issues by many users.

2002 vn750
AGM battery, Shinko 230 tires oversized front
Ear shaved - k&n pods, drilled clutch basket
MCCT
40/138 jetting

If I can split a case and make it work - you can too!
Forum pictures:http://s150.photobucket.com/user/Gid...?sort=3&page=1
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