I'd need to see the carb; I'm more familiar with the Mikuni that has a pilot mixture screw under the carb, near the intake tube. In that design, it controls fuel.
In general terms, two stroke carbs have a pilot mixture screw near the air cleaner end, and it controls air.
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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