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Float bowl gaskets

  • Thread starter Thread starter Anthony
  • Start date Start date
A

Anthony

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I rebuilt the carbs on my '76 GS 750 about 2 years ago. At the time I couldn't find a gasket set as they were discontinued, so I cut my own gaskets. I used a red spray-on gasket sealant. There is now fuel leaking from the left two bowls (kick stand side). I took the gaskets out and there is no sign of the original red gasket sealant. It must have been dissolved by the fuel. Can anyone suggest a better gasket material (I used regular gasket paper) or a different sealant that would not be dissolved by fuel. Thanks.
 
Does fuel resistant paper still need to be used with a gasket sealant?
 
I usually make my carb gaskets ('cos I never think in advance and can't wait for the postie) but they are cheap. Ask at your local car spares for paper that won't leak fuel (and make sure that you're talking to somebody who knows what he is on about, not the usual Halfords teenager) rather than paper that won't be rotted by fuel.

I would never use gasket sealant on carbs - when you tighten up you might squeeze some into the float bowl, where there isn't a lot of room, and jam the float. Or a bit might break off and block a jet. Or, as you've found, it might dissolve.

Wally
 
You should make sure the float needles and seats are not leaking. It doesn't take long for aftermarket parts to fail or for that matter even work in the first place. Or make sure the petcock is not leaking. I will no longer use aftermarket parts in my carbs. I will buy kits for O rings and gaskets but I never use the hard parts in the kits. My two cents.
 
Anthony said:
Does fuel resistant paper still need to be used with a gasket sealant?
Click to expand...

Don't seal them, just makes it impossible next time. They don't leak, there's no pressure as the bowls are vented, and the gasket is above the level of the gas as it sits in there. I reuse them forever and they don't leak unless they get torn or cut.
 
Ditto

Ditto

tkent02 said:
Don't seal them, just makes it impossible next time. They don't leak, there's no pressure as the bowls are vented, and the gasket is above the level of the gas as it sits in there. I reuse them forever and they don't leak unless they get torn or cut.
Click to expand...

My thoughts, exactly!
 
A little tip from my professional wrench. Smear both sides of the gasket with a little axle grease rather than sealant. It keeps the paper pliable and reuseable and is not affected by gas.

You can use this technique on most any gasket other than head gaskets and other high heat applications.

Give it a whirl.
Cheers,
spyug
 
spyug said:
A little tip from my professional wrench. Smear both sides of the gasket with a little axle grease rather than sealant. It keeps the paper pliable and reuseable and is not affected by gas.

You can use this technique on most any gasket other than head gaskets and other high heat applications.

Give it a whirl.
Cheers,
spyug
Click to expand...

I think that's good advice. Also, regular motor oil will do the trick.
 
walt said:
You should make sure the float needles and seats are not leaking. It doesn't take long for aftermarket parts to fail or for that matter even work in the first place. Or make sure the petcock is not leaking. I will no longer use aftermarket parts in my carbs. I will buy kits for O rings and gaskets but I never use the hard parts in the kits. My two cents.
Click to expand...

The carb "rebuild" was more of a good cleaning. I only replaced the o-rings and the gaskets. I also realize that the gaskets sit above the fuel level when the bike is sitting level. However it's only when the bike is leaning on the kickstand when the gaskets leak. I'm going to go pick up some fuel resistant gasket paper (will cork paper do the trick?) and use that axle grease/oil trick. Thanks for the help.
 
They are available from a dealer. Part # 13251-43010. They're about $5.00 each
 
Anthony said:
The carb "rebuild" was more of a good cleaning. I only replaced the o-rings and the gaskets. I also realize that the gaskets sit above the fuel level when the bike is sitting level. However it's only when the bike is leaning on the kickstand when the gaskets leak. I'm going to go pick up some fuel resistant gasket paper (will cork paper do the trick?) and use that axle grease/oil trick. Thanks for the help.
Click to expand...
why not just get the correct gaskets?? Z1 sells the whole set and i think i paid 12 bucks maybe?? You have more patience than i perhaps...lol
 
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