July 16th, 2013, 03:42 PM | #1 |
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Should I replace the petcock if it leaks while disconnected?
Set it to "on" and it continues to free flow fuel.
Should I buy a new one, does it have any affect when its all plugged in? My thinking is yes because it would allow fuel to run and flood the carbs even while it is off? Can I replace just the petock and not the entire tank?
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July 16th, 2013, 05:02 PM | #2 |
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Yep, you should rebuild or replace the petcock. No need to replace the tank.
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July 16th, 2013, 06:11 PM | #3 | ||
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Quote:
Quote:
vs buying a new one?
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July 16th, 2013, 06:47 PM | #4 |
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What I did was take the entire petcock apart, cleaned everything, bend the spring washer so it was springy again and put it back together. No more leaks.
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July 16th, 2013, 07:09 PM | #5 |
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Thanks you may have saved me 40 bucks we shall see
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July 17th, 2013, 03:17 PM | #6 |
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In the image below, the spring was not pushing the diaphragm close enough to close the pet cock. I just stretched the spring (on the rt hand side of the picture) and no more leak!
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July 17th, 2013, 03:55 PM | #7 |
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Sometimes you get lucky with a fix....other times not. $60 to replace.
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July 17th, 2013, 05:05 PM | #8 | |
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Quote:
Yea man they don't sell just the spring either, you can buy the diaphragm and other parts separate. Id look in a hard wares store for a spring. 2008+ ninja 250 Petcock repair fix rebuild replacement
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March 8th, 2014, 10:03 PM | #9 |
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April 29th, 2014, 12:30 PM | #10 |
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glad i could help
Mine still is holding as well!
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April 29th, 2014, 12:31 PM | #11 |
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I bought a brand new one that leaked within 3 months. If the above works I will be more than delighted. The stock ones suck.
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July 2nd, 2014, 11:13 AM | #12 |
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Any update?
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July 2nd, 2014, 01:24 PM | #13 | |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
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Quote:
I ask because my original one had what looked like a deformed Teflon ring inside that the O-ring could not seal against (portion was missing). Others have found the same problem in theirs. Neither the ring nor the part it is permanently attached to are replaceable without buying a whole petcock. I ordered a new one and it does not have that Teflon-looking ring thing at all. I guess they revised it. The thought crossed my mind that it was the same defect (completely missing as opposed to a portion missing), but it does seem to work (stopped the leaking). The thing is, mine was NOS from perhaps a couple years ago, so it's hard to pinpoint when they revised it. I bought it from an eBay seller who never opened it. Even then, the fuel filter part was broken from being bent in the package (thanks, Kawasaki ). It, too, doesn't appear to be replaceable. Amazon has a ton of petcocks and repair kits that say they fit the J-bike but I doubt the petcocks fit and the repair kits probably do not fix the units with the deformed Teflon ring problem. I've had these links in my Amazon cart for the last couple months: http://www.amazon.com/gp/product/B00...A1TFBK3C7LO58P http://www.amazon.com/gp/product/B00...A3TGC5XRRCX4P2 Also, this one looks like a generic with reserve, which may work: http://www.amazon.com/gp/product/B00...=APWEXLRBMNT4U You'd probably have to plug the vacuum line, since it seems to speed up the engine when disconnected (unless that's just me?). Last futzed with by CZroe; July 2nd, 2014 at 07:54 PM. |
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July 2nd, 2014, 03:12 PM | #14 |
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Bought it 1.5 years ago. Tried this and it still leaks.
Edit: I got it from kawasaki. Last futzed with by mgentz; July 2nd, 2014 at 04:48 PM. |
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July 2nd, 2014, 03:19 PM | #15 |
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A leaking peacock will fill your crankcase with fuel leak out on the garage floor and burn down the house. I would replace it.
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July 2nd, 2014, 03:40 PM | #16 |
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I keep my petcock on the prime position all the time with the cr33 carbs. Thats what sudco recommended. I put in the on position sometimes.
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July 2nd, 2014, 04:08 PM | #17 |
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If you or another member could post a how-to for this, I'm sure the community would appreciate it greatly.
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September 18th, 2014, 10:31 AM | #18 | |
ninjette.org member
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Quote:
From there its 2 bolts to remove the petcock, and my "DIY" is already here saying sometimes you can fix the slow leak possibly by stretching that spring in the picture I understand maybe some of the confusion comes from not knowing how to separate the petcock I do not recall specifics and I wont be removing mine for a while to come. If you look at the picture though you can see how the diaphragm lays after it was pulled apart as well as the other parts.
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September 18th, 2014, 11:01 AM | #19 |
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Here's my tale with pics and analysis of the leaking issue:
https://www.ninjette.org/forums/showthread.php?t=44054 On the 08, with its vacuum-operated petcock, a leak won't dump gas all over your garage, nor will it fill the crankcase with fuel. There's no affect on bike operation.... ... IF your float seals are in good shape. Gas flows out of the tank into the bowls, floats rise until they seal the fuel line. Gas gets drawn out of the bowls by engine operation, floats fall, gas flows. Simple. If the float seals leak AND the petcock won't shut off, well, then you really do have a problem. It's also an issue if you have to take your tank off for some reason. Then it's a Bad Thing. But for normal riding around, nah. So basically the leak just disables a safety feature, namely the automatic shutoff at the valve when the engine stops running. I only discovered it when I tried to drain the bowls for winter storage. Naturally, fuel just kept flowing and flowing.... I replaced mine, because the teflon bit was shredded. Also, the black rubber gasket is SUPER flimsy. Bottom line: Leaking fuel sucks. This is a basic safety issue. It will fail, even if you've McGyvered it. Recommend replacement.
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September 18th, 2014, 02:10 PM | #20 | |
ninjette.org member
Name: Derek
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Quote:
Also its been a over a year and still the petcock still has not flooded my carbs. And whose to say how long the next spring will last, and you cant even buy the spring you need to buy the entire unit. After reading your thread I'm assuming you're arguing which piece is actually failing, the spring or the Teflon sealing material and that stretching the spring was an incorrect fix? If the vacuum is strong enough to open against this spring, and it is create a stronger seal against that Teflon part you had a problem with, I don't see the issue.
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August 20th, 2022, 01:57 PM | #21 | |
CPT Falcon
Name: J.Emmett Turner
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Quote:
Like you, I replaced mine and it appeared to be working. Even with the known-bad one, my carbs never appeared to be flooded but my oils did smell like gas. After several years and ZERO miles on the new petcock I found the tank completely empty. I suspect you don’t find flooded carbs because it makes its way out and into the cylinders without obviously overflowing the carbs. If you drain them first you’d never know. |
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