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To align the butterfly the throttle shaft lever may need to be lightly sanded where it meets the throttle stop.
The Carburetor Throttle Shaft fits most Clone Carburetors including the Tillotson PK-1, Hyuai, Ruixing, and SP Carburetors on the Honda GX200, Ducar 196, Ducar/Tillotson 212E, Tillotson 196R/RS, Tillotson 212R, Ducar/Tillotson 212E, Predator 212 and BSP 196 and 212 Engines.
AKRA 2020 Rules for Throttle Shaft
Throttle Shaft .115” minimum thickness. Stop arm of the throttle shaft may be filed to adjust butterfly position
NKA 2020 Rules for Throttle Shaft
18.104.22.168: Throttle Shaft
Throttle shaft is .115” minimum thickness; the material is non-tech.