Found this on the shop floor. Vaguely remember fussing with it when rebuilding carbs but can't for the life of me remember where it came from. Opened up carbs thinking it might go around emulsion tubes but does not seem to fit. Looked at carb diagram and can't find anything that looks like it. Prepping for first track day and want to make sure everyhting is in order.
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MC21R9N track
MC18R2J track
CBR954
CR250