petcock

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PippiFyrecracker
Around the block
Posts: 66
Joined: Mon Apr 06, 2015 6:17 pm
Country: Canada
Suzuki 2-Strokes: 1975 T500, 1983 SP250
Location: ottawa, ontario, canada

petcock

Post by PippiFyrecracker »

petcock was leaking from both right and left valves, just a drip every couple of seconds
basically I'm trying to figure out where in the petcock the issue is, could the dial seal be causing it? it was definitely damaged, I tried flipping it since it was symmetrical, and it completed the seal, but it seemed to leak worse afterwards :(


soo I'm trying to repair a petcock to hold me over till i can get new parts
$$$$$$+time(shipping is forever) and I want to ride now.
also how do I post a pic I tried 4 ways and nothing worked...

here is a link
https://www.facebook.com/photo.php?fbid ... =3&theater" onclick="window.open(this.href);return false;
pearljam724
AMA Superbike
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Suzuki 2-Strokes: 75- GT 550 / 76- GT 750
Location: SW PA

Re: petcock

Post by pearljam724 »

Inside the petcock is a rubber diaphram. If you gently remove it, there will be a loaded spring behind it. These springs lose tension. Take the spring and ever so slightly pull on it a hair. This will increase the tension of the spring. This often works, it sometimes doesn't. I'm not a fan of rebuild kits. It pains to pay the rediculous prices for a new complete original petcock. But, it's worth the headaches and should last for several years to come. Making that worth it. You have a huge gap of rubber missing between two ports. And the edges of your diaphram look suspect. Rebuild kits don't include a new diaphram or spring. But judging by the picture your main problem is the gash of rubber missing. Which that gasket is easy to replace in a rebuil kit. But, if your diagram is also an issue. It'll take a new complete petcock. Patch repairing petcocks has a large failure rate. You don't want today's ethanol exposed to crank seals. That's where it ends up, if the leak is flooding the carbs. That's what the diaphram helps prevent. Check crank oil for smell of gas.
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jabcb
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Suzuki 2-Strokes: 69 T350 thru 75 GT750
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Re: petcock

Post by jabcb »

The webserver’s storage space for pics is full so we can’t upload any more pics.
Use the “Img” button to include a link to your pic.

Your lever gasket is shot.
Its still available from Suzuki — fastest way to get it is likely from your local dealer.
A nearby eBay seller that has it in hand might be a bit faster if he ships promptly.

The 75 T500M parts manual doesn’t show the lever gasket as a separate part.
But the part is shown for the 73 GT250K, which uses the same petcock.
See part # 44341-18450
http://www.partzilla.com/parts/search/S ... parts.html

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markush
To the on ramp
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Suzuki 2-Strokes: GT250/380
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Re: petcock

Post by markush »

Hi!
I do my petcock repairs with new diaphragm made of 0,38mm membrane material.
Description on this page: http://suzuki-gt250.de/motornavi/motor.php?b=8&m=M1

google- "translation":
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PippiFyrecracker
Around the block
Posts: 66
Joined: Mon Apr 06, 2015 6:17 pm
Country: Canada
Suzuki 2-Strokes: 1975 T500, 1983 SP250
Location: ottawa, ontario, canada

Re: petcock

Post by PippiFyrecracker »

thanks so much for all the info guys, you were right it was the spring, I watched this video then took it apart and stretched the spring, no more leak, gonna test it out again later...
https://www.youtube.com/watch?v=5DqvB_5gP20" onclick="window.open(this.href);return false;
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