Does this even seem possible?

[alke46]

$273.00 for an OEM petcock to replace the one on my 79 1000E. Holy crap, looks like I will be checking out the Pingle brand.

I've had mine out of the tank a couple of times and when I last put gas in the tank today, it was holding back the flow until a couple of hours later. Then it broke loose and now will no longer keep the gas from flowing in the run position

Time to go shopping for a replacement.

 

[JTGS850GL]

The 1978 1979 GS750E petcock will fit and is 1/3 the cost. The outlets face a little different directions but will work.

 

[alke46]

Thanks for that info. I was going to check to see if other model petcocks would work. I see on here all the time advice to replace them for 60-65 dollars, so the search is on. Thanks again.

Larry

 

[Guest]

$273.00 for an OEM petcock to replace the one on my 79 1000E. Holy crap, looks like I will be checking out the Pingle brand.

I've had mine out of the tank a couple of times and when I last put gas in the tank today, it was holding back the flow until a couple of hours later. Then it broke loose and now will no longer keep the gas from flowing in the run position

Time to go shopping for a replacement.

You can cap off the vacuum side and put a quality inline on/off in the gas line (not one of those cheapo lawn mower types) and just have a manual one

 

[alke46]

I know what you are saying but I can't picture this in my mind due to space limitations. Where would this inline on/off switch fit? I guess that is why I am thinking that a pingel would be the right move, no?

 

[tkent02]

Seen this???

http://www.thegsresources.com/_foru...erting-a-vacuum-petcock-into-a-manual-petcock

A lot better than an inline valve, a lot cheaper than a new petcock.

 

[alke46]

Seen this???
http://www.thegsresources.com/_foru...erting-a-vacuum-petcock-into-a-manual-petcock

A lot better than an inline valve, a lot cheaper than a new petcock.

Yes I did see that but when I put gas in the tank today, I had the tank sitting on a portable bench and with the petcock switch it the on position, the gas did not flow at first but then a couple of hours later, it started flowing. So would it not also flow uncontrollably with your modification?

 

[alke46]

Tom, after posting this response, I went back and looked at your mod again and I agree that with the lever in the straight up position, it should not let any fuel flow. In theory at least.

 

[tkent02]

No, not at all as long as the part that selects reserve, prime or on is working. They usually are, it's the vacuum valve that usually fails.


If those parts are shot, they are very cheap from Suzuki.

 

[TDC311]

No, not at all as long as the part that selects reserve, prime or on is working. They usually are, it's the vacuum valve that usually fails.


If those parts are shot, they are very cheap from Suzuki.

^^^ Agree!

Sounds like you need one of these: https://www.z1enterprises.com/product/KL18-4354

If you go this route pay close attention on how things go together. I messed up a petcock rebuild the first time because i put something in the wrong order and it made my problem worse. Then I found this post: http://www.thegsresources.com/_forum/showthread.php?168743-GS750-Petcock-test which helped a lot.

Especially this: http://members.dslextreme.com/users/storagecliff1/images/suzuki_petcock_rebuild.pdf

Follow that PDF and you can't go wrong.

 

[tkent02]

You can get all of those parts except the diaphragm for about $7 from Suzuki, the vacuum part of the rebuild kits rarely work anyway.

 

[Big T]

Alke,

What Tom says. Your problem sounds like the 3 hole disc has failed. Also get the square O ring that goes around the lever. That may cure your problem. I've replaced those parts a number of times in the 37 years I've owned mine.

You may have some crud built up inside, scrub the area you can see inside with a scotchbrite and some carb cleaner. Don't mess with the vacuum diaphragm at all. A bit of silicone lube on the new rubber bits and you'll be amazed how easy the lever works

 

[alke46]

Alke,

What Tom says. Your problem sounds like the 3 hole disc has failed. Also get the square O ring that goes around the lever. That may cure your problem. I've replaced those parts a number of times in the 37 years I've owned mine.

You may have some crud built up inside, scrub the area you can see inside with a scotchbrite and some carb cleaner. Don't mess with the vacuum diaphragm at all. A bit of silicone lube on the new rubber bits and you'll be amazed how easy the lever works

Don't you mean the 5 hole disc? I did replace everything except that diaphragm. I had to grind off the lever to get it to go all the way straight up, but now it actually does stop the flow of gasoline.
Thanks,

Larry