taco eater :
I eat gurtners for breakfast from san diego, CA United States
and throw that gurtner in the trash. It even has an unpleasant almost offensive sounding name, 'gurtner', sounds like someone who would sexually assault you. Whoever designed the bowl and float on this carb should be executed on live television. replace this carburetor with literally anything else. Yours is likely covered in white aluminum oxidation anyway and should be totally unserviceable.
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Do yourself a favor buy just the gasket instead
August 14, 2021
taco eater :
my name is what from United States
Comes with the screw in retainer for that type of diffuser but then includes the other press-fit type diffuser with no retainer. You'd have to run the choke cable out of and back through the chassis to replace the slide if you like to scooter in the cold (France's fault not treats). And who wears out an idle screw? No bowl o-ring or screw seal.
Maybe you could use the jet in addition to the gasket but like the description says it's huge and easy to clean. No float parts either so you might as well just the $3.75 gasket from treats instead. Still cheaper bought separately if you lost your idle screw and won't clean a jet.
Do your taco a favor 
Do yourself a favor buy just the gasket instead