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Reply to "1915cc carburetor set up"

Actually, idle jets can be partially active up to about 3500rpm depending on airflow of the motor.

I believe the stacks I have are 2.25 inch and that's what Webers usually come with. I would recommend a set, the 2.25 size fits under the air cleaner and work just fine.

I don't think the velocity stacks will alter your jetting much(especially short ones in a Speedster), but they are good for drivability.

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