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Do you normally only have to do the primary throttle shaft and NOT the secondary..



The 2ndary shaft does not take the abuse the primary shaft does. The wear is generally a result of the amount of use the primary shaft gets and the return spring tension. The net result is that the primary bore on the throttle lever side 'elongates' over time. The new bushing corrects this.



Does the shaft itself ever wear out?? I gotta assume the hole in the carb body is much softer but I "gots tu know"....