Identifying seal 81 750

[Crankthatback]

#57 is a lock washer for the float bowl screw. The carbs on my GS850GL have the same rubber "spacer" in there. I just reused the old ones.

I believe it is just to take up space and hold the float bowl gasket flatter when you tighten it down. Or maybe to keep the metal plug from vibrating out. The metal plug must sit lower in some models. Doesn't really seal anything and you could just use any piece of rubber that would fit there. Perhaps cut from some rubber sheet.

Glad I did not jump the gun and buy that.
Hopefully I would have noticed while looking at corresponding part # in diagram but chances are I would not have.
So you likley saved me a few bucks.

[Crankthatback]

Some carbs have those seals, and others don't. I've never seen them offered for sale before.

Thank you. Another person/handle remembered from my original introduction into the world of GS.

[Crankthatback]

I have the rubber washers in all the cv carbs on my Suzukis. They have been there from the start. Have used appropriate sized O rings as replacements, with success.

V

I may go the o-ring route.
Vitriol o-rings? For fuel resistance.

[KiwiAlfa156]

Just because I've never seen one doesn't mean it's not meant to be there. Its interesting as it sits underneath and is covered by the gasket (carbs inverted for reassembly) so what does it seal? I've never had a problem with leakage or starting. As far as I know the choke plungers are the same and the only difference is the method of actuation, either by lever or cable to a remote lever (bar mounted) or in the case of the 550/1000/1100 Kats a side-cover knob. A Mikuni mystery.

[Nessism]

Just because I've never seen one doesn't mean it's not meant to be there. Its interesting as it sits underneath and is covered by the gasket (carbs inverted for reassembly) so what does it seal? I've never had a problem with leakage or starting. As far as I know the choke plungers are the same and the only difference is the method of actuation, either by lever or cable to a remote lever (bar mounted) or in the case of the 550/1000/1100 Kats a side-cover knob. A Mikuni mystery.

Those plugs are press fit into the body, but sometimes they fall out. When faced with a hopeless carb body that can't be repaired, I hack saw the body apart and extract the plug, because sooner or later someone here will need one (or maybe me). The donut seal must be Suzuki's (or Mikuni's) acknowledgement that this can happen. Or, leakage can occur.

[KiwiAlfa156]

Those plugs are press fit into the body, but sometimes they fall out. When faced with a hopeless carb body that can't be repaired, I hack saw the body apart and extract the plug, because sooner or later someone here will need one (or maybe me). The donut seal must be Suzuki's (or Mikuni's) acknowledgement that this can happen. Or, leakage can occur.

Makes sense. Thanks Nessism

[Crankthatback]

Those plugs are press fit into the body, but sometimes they fall out. When faced with a hopeless carb body that can't be repaired, I hack saw the body apart and extract the plug, because sooner or later someone here will need one (or maybe me). The donut seal must be Suzuki's (or Mikuni's) acknowledgement that this can happen. Or, leakage can occur.

Great to know.
They are there to insure that the plugs do not fall out, and nothing gets past the plug if machined incorrectly be it the plug or the bore.

Knowing that eases my mind knowing just the correct sizeo-ring will do the job.

Thank you Nessism!