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Looney Cylinders
 Post subject: Re: Dripping petcock
PostPosted: Tue Feb 28, 2012 6:48 pm 

Joined: Thu Jun 09, 2011 2:00 am
Posts: 1010
Location: Southern Ontario, Canada
A VERY thin smear of fuel resistant silicone grease upon assembly helps too. Don't operate it dry (no fuel) either..

J
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ThatGPzGuy
 Post subject: Re: Dripping petcock
PostPosted: Tue Mar 06, 2012 9:00 pm 
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Joined: Sun Sep 11, 2011 7:02 am
Posts: 266
Location: North GA
Got it done. I think I had two problems. When I rebuilt the petcock I did not have the vent holes lined up correctly. I fixed that and still had a drip but Jim sent me the correct O-rings so no more dripping petcock!

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Jim
Atlanta, GA
1974 H1
1976 KZ400
1979 XS650 Cafe
1982 GPz750
2001 KZ1000P
1965 Mustang
1967 Triumph GT6
1976 Bronco
"If you didn't build it; it's not really yours"
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Jim
 Post subject: Re: Dripping petcock
PostPosted: Tue Mar 06, 2012 9:05 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9841
Location: North Central NC
Good, I'm glad that did it. I have half a dozen petcock spare diaphragms here, and they all have rock-hard o-rings on the plungers.

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If it surges, that's normal, upshift.
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ZERO
 Post subject: Re: Dripping petcock
PostPosted: Wed Mar 07, 2012 4:48 am 

Joined: Tue Dec 27, 2011 11:37 pm
Posts: 726
Location: SUNRISE FLORIDA USA
The new 10% gas takes a toll quickly on some rubber parts.

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1972 H2, modified and Tracy bodied. 77 Kawi 1000. Lime green. Cafe. Lester wheels.
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Jim
 Post subject: Re: Dripping petcock
PostPosted: Wed Mar 07, 2012 9:39 am 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9841
Location: North Central NC
True, but in this case my old rock-hard ones have never seen "new" gasoline, and the O-rings I sent Jim are Viton, so they should last a while.

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If it surges, that's normal, upshift.
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ZERO
 Post subject: Re: Dripping petcock
PostPosted: Wed Mar 07, 2012 12:00 pm 

Joined: Tue Dec 27, 2011 11:37 pm
Posts: 726
Location: SUNRISE FLORIDA USA
I recently had a CHINESE copy petcock on my Z1 that the rubber parts turned into gummy worms and o-rings on the carb junctions did the same.

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1972 H2, modified and Tracy bodied. 77 Kawi 1000. Lime green. Cafe. Lester wheels.
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