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New petcock diaphram waste of time

  • Thread starter Thread starter rthor
  • Start date Start date
R

rthor

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I'm sure I'm not the only one to have experienced this problem, but try as I might, that new petcock diaphram was not going to seal. With the new part in place and all tightened down, gas would keep trickling out the spigott. I eventually gave up on it and put the old one back.
Has anyone out there had success with replacing the diapram? Is there something I have to do to make it work, or should I just accept the fact that I need to buy a new OEM petcock complete?
 
Hi Mr. rthor,

Some folks have had success rebuilding the petcock. But, as always, your mileage may vary.

I can tell you this; From what I've read while being a member of this forum, when my petcock fails I'm getting a new one. Then I won't have to worry about it for another 30 years.


Thank you for your indulgence,

BassCliff
 
It is not the diaphram, it is the seat for the O ring in the valve body that is leaking. If you don't have a smooth even surface for the O ring to seat on it will leak. Look at the valve seat for the O ring for corrosion and blemish.
If not absolutely smooth you will have to make a mandrel with the same taper and polish the seat useing silver pollish or brasso or sum such item.
V
 
i just got my new petcock in the mail today wow! what a difference. looks great and works fab!! dave p.s. and almost cheaper than a kit:cool:
 
I'll open it up again and do some polishing...we'll see how that goes. Thanks for the tip.
 
The first two purchases I made when I first started working on my bike was an o-ring set for the carbs and a new petcock. I've never had any problem with either of them.
If you have the scratch, buy a new one. There's fuel flowing over a very hot engine and in between your legs. I, for one, want to know it's not going to leak.:)
 
Can always go with a Pingel petcock.

Manual. on/off. Just remember to turn it off.

I have gone back to a SGP (OEM) on the petcock, but any trouble, and Pingel it is....
 
I've only been fooling with this '77 GS550 for a few months now, and since the new petcock washer and diaphragm couldn't stop the drippage, I ordered the Pingel stuff for it. Still waiting for it to arrive. A Canadian Customs guy probably took it home to try on his own GS for a couple weeks, as usual...
 
Pingle is fine, but it seems kind of like going back to the days of no cell phones nor computers. Try the rebuild first, if it doesn't work, buy a new petcock
 
Hi all: I bought a new OEM petcock (fuel valve). After it was installed it was hit and miss with with the fuel flow. When the bike would be starved for fuel I put it on PRI later back on ON. For the last few weeks it seems to be running as it's suppose to. Is the "Pingle Petcock" a viable alternative? and why the comment... "Pingle is fine, but it seems kind of like going back to the days of no cell phones nor computers." If the older style works without any issues it seems like a no brainer to go to it.
 
babylon9484 said:
Hi all: I bought a new OEM petcock (fuel valve). After it was installed it was hit and miss with with the fuel flow. When the bike would be starved for fuel I put it on PRI later back on ON. For the last few weeks it seems to be running as it's suppose to. Is the "Pingle Petcock" a viable alternative? and why the comment... "Pingle is fine, but it seems kind of like going back to the days of no cell phones nor computers." If the older style works without any issues it seems like a no brainer to go to it.
Click to expand...

The only "no brainer" with a Pingle is that after you forget and leave it on, you'll be rethinking the OEM set up and the answer will, at that point...be a no brainer. :-\\\ :D
 
Dave8338 said:
The only "no brainer" with a Pingle is that after you forget and leave it on, you'll be rethinking the OEM set up and the answer will, at that point...be a no brainer. :-\\\ :D
Click to expand...

No...I don't think so. Pingles look good, feel good and move smooth as butter....Simple and effective
Sexy is the right word...:D

Never did like or trust those ugly, oem auto-on petcocks...;)
 
With a pingel, it's a turn on/shut off deal.

Turn it on when you start the bike and turn it off when you stop it. IF you forget to turn it off, you'd better hope your needle valve seats are in good working order or you'll have gas everywhere. And it only takes one time to forget..........
 
Ah, the good old days...

Remember to turn on the gas
Remember to turn on the lights
Remember to put up the kickstand
No gas gauge
No neutral light
No gear indicators
Use your arm to signal

My-o-my, how did we manage to ride at all....:p
 
Baatfam said:
No...I don't think so. Pingles look good, feel good and move smooth as butter....Simple and effective
Sexy is the right word...:D

Never did like or trust those ugly, oem auto-on petcocks...;)
Click to expand...

Hey Bob.

IF I ever do a CAFE/bobber rat with an attitude bike (and sexy paint), I'll be looking for a brass Pingle to spit shine! ;)
 
I had issues with my petcock rebuild kit as well. I could have bought a pingle but for me the whole point of this bike is to fix things myself and not buy new parts to fix an old bike if it could be helped at all. After talking to Gustov and polishing up the tapered hole the post and o-ring sit in it still dribbled. I ended up sanding down the spacer that is sandwiched between the two diaphram layers. I sanded it down about 1/3 original thickness with a right angle grinder. That allowed the post o-ring to seat itself completely and no more leaks.
 
Due to lack of time I haven't got around to taking on the project yet. I'll be giving it another go on the weekend.
Don, I was looking at the diaphram and I can't see how I would be able the take out the middle spacer. Any suggestions?
 
Don, I was looking at the diaphram and I can't see how I would be able the take out the middle spacer. Any suggestions?
Click to expand...

with my petcock the diaphram has a plastic spacer that fits in between the two "sheets" of the diaphram. to take it out just hold the spacer on the edges and push the post through a hole in the spacer. you cant see this hole but it's there. your rebuild kit should have come with a new diaphram and that diaphram needs to be used with that spacer if you had one in the original set-up. by the way, there is a good write up on a petcock rebuild with assembly pictures on BassCliffs web page, do a search for petcock rebuild and you should see it.
 
tejasmud said:
can always go with a pingel petcock.

Manual. On/off. Just remember to turn it off.

I have gone back to a sgp (oem) on the petcock, but any trouble, and pingel it is....
Click to expand...

+100.............
 
Lots of problems with the old petcocks & trying to rebuild them which is why A replacement is sugested. Pingle also makes a vacuum operated petcock if you want to spend the $$$$
 
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