petcock replacement - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 25 (permalink) Old 11-10-2010, 06:34 PM Thread Starter
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Exclamation petcock replacement

Hello all, I need to replace the petcock, it is leaking from everywhere and I don't think just the repair kit will fix it.

so, my question is, is there any other petcock that you would recommend instead of the OEM? cheaper, better, etc!!

thank you all.

Adrian Murillo C.
'92 Vulcan 750.
RR Relocated.

Heredia, Costa Rica.
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post #2 of 25 (permalink) Old 11-10-2010, 11:14 PM
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Unless the metal components are cracked or warped, the repair kit should fix it. Sorry, don't know which, if any, petcocks can be swapped for it.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
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post #3 of 25 (permalink) Old 11-11-2010, 12:01 AM Thread Starter
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leaking from the sides.

Quote:
Originally Posted by flitecontrol View Post
Unless the metal components are cracked or warped, the repair kit should fix it. Sorry, don't know which, if any, petcocks can be swapped for it.
the thing is that it is leaking from the left and right sides, on the elbows that connect the hoses to the petcock. and it doesn't use any o-ring.
so my guess is the kit won't fix it since this piece is bare metal, nothing to replace there.

My wrench guy told me that there are some petcocks from yamaha that should work, but my cell phone is not working and his number is there! so I have no way to call him 'til I can get the numbers out of the cell phone.

anyone else knows about a "compatible" petcock?

Adrian Murillo C.
'92 Vulcan 750.
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Heredia, Costa Rica.
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post #4 of 25 (permalink) Old 11-11-2010, 12:57 AM
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Are the petcock elbows corroded or cracked. Is that why it leaks around the hose?

Here are two vn750 petcocks on ebay.
http://shop.ebay.com/i.html?Model=VN...=p3286.c0.m282

Gordon

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Purchased May 16, 2008
Approx.19,300km (12,000 miles)

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TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
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post #5 of 25 (permalink) Old 11-11-2010, 09:42 AM
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Those elbows are friction fitted into the petcock. Mine will move if enough pressure is applied to them, but they don't leak. If mine started to leak, I would pull them out, apply some fuel impervious adhesive, and reassemble.

Do yours leak when the engine is shut off? If so, the repair kit will definitely fix it.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #6 of 25 (permalink) Old 11-11-2010, 01:42 PM Thread Starter
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yes

Quote:
Originally Posted by flitecontrol View Post
Those elbows are friction fitted into the petcock. Mine will move if enough pressure is applied to them, but they don't leak. If mine started to leak, I would pull them out, apply some fuel impervious adhesive, and reassemble.

Do yours leak when the engine is shut off? If so, the repair kit will definitely fix it.
yes it seems that it doesn´t have enough friction to keep the fuel in. I'll try using the adhesive on the elbows fitting.

and yes, mine leaks a lot with the engine off. so you said it means that the kit will stop all the leaking!?

Thank you!

Adrian Murillo C.
'92 Vulcan 750.
RR Relocated.

Heredia, Costa Rica.
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post #7 of 25 (permalink) Old 11-11-2010, 02:14 PM
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The petcock is vacuum operated. If the internal diaphram is functioning properly, fuel flow should stop when the engine is turned off. I'm guessing yours is messed up and the rebuild kit would fix it.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #8 of 25 (permalink) Old 11-12-2010, 08:14 AM
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I had a brawl with my petcock a year or so ago (the posts are around here somewhere). I wound up replacing the diaphragm and every piece of rubber associated with it. Solved the problem, but it was a pain in the butt...

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post #9 of 25 (permalink) Old 11-16-2010, 09:01 PM Thread Starter
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ended up replacing it.

Thank you all for your feedback.

I ended up replacing the whole petcock with a third party one. I just took it to a parts store and I found a brand new petcock (very cheap btw), it does not have the vacuum thingy but it has an OFF position. (the older one had it but where not plugged anyway, since the diaphragm was not working as expected).


At least my problem is solved for now. I bought this cheaper replacement since my bike needed . since I live in Costa Rica, its kind of hard to find OEM parts here, and if I'm able to find them they are waay expensive. I rather buy everything in ebay or other online store, but the shipment takes at least a week to get down here!!

PD.
the new petcock is supposed to be from Yamaha.

Adrian Murillo C.
'92 Vulcan 750.
RR Relocated.

Heredia, Costa Rica.
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post #10 of 25 (permalink) Old 11-16-2010, 09:48 PM
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Hey, if it works, it works.

You might post more info on the petcock in case someone else needs a cheap replacement option.
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