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Old August 20th, 2022, 12:08 PM   #41
CZroe
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Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009

Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F

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Originally Posted by CZroe View Post
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Originally Posted by Alex View Post
Why do you keep mentioning me?
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Originally Posted by CZroe View Post
@Alex: PDF requested!
To get it archived as a PDF attachment before his image host changes or we lose it some other way.
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Originally Posted by Alex View Post
PDF added to that post.
Thanks again! It seems we did lose his pics over time and the PDF was useful in verifying the issue. I had another petcock failure with zero miles on a ďnewĒ petcock produced in late 2011, which wouldíve been the last production run for EX250J bikes. It sat 8 years but the entire tank emptied out God-knows when. I can confirm it was set to On, not Prime.

Quote:
Originally Posted by maverick9611 View Post
their is tons of rebuild kits for this defective part.. this thread at beginning said it was couldn't be rebuilt. just trying to clarify.
I donít think they were available at the time, but whether or not you can rebuild with one depends on your petcockís mode of failure.

If yours leaks because of a defective Teflon-like ring molded to the inside, itís not serviceable. If it leaks because of replaceable gasket, seal, or o-ring failure, it likely is serviceable.

It looked like an air bubble molded into mine which filled up with fuel and crumbled to bits when I touched it. I didnít see the molded ring at all in my replacement petcock so I assumed it was a revision that fixes the issue. Unfortunately, my trust was misplaced: I installed it in 2014 and left the bike sitting with a full tank of Enthanol-free E0 and a whole can of Sea Foam. I finally checked yesterday (8 years!) and found the entire tank had emptied and rusted with zero miles on that late-production petcock. Bone dry. Iím eager to look inside again to see if there is a ring after all. Perhaps is is not molded but, rather, formed from fuel deposits or somethingÖ or maybe I just missed it the first time (looking in wrong side?). I honestly donít remember looking but this thread says I did. Time to edit that into my rebuild thread.

Since this or some other failure is still happening even with petcocks produced for the 2012 year model, I donít trust any of them from Kawasaki. Is there a 3rd party option?
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Old August 20th, 2022, 01:41 PM   #42
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
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Motorcycle(s): CB125T EX250F-street Ninja250R-race CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR VFR750F

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MOTY - 2018, MOTM - Nov '17
Worn-out petcock diaphragm spring has lots to do with this. Have not had any issues with pre-gen or new-gen petcocks after rebuild with K & L rebuild kit. Also ducatiman installs modern ethanol-resistant seals that last longer and seals better from start.

Here's recent petcock thread: https://www.ninjette.org/forums/showthread.php?t=379579
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