Most 1.25" Carbs I've rebuilt have not required bushes. In the 1.25" the bushing area where the throttle shaft runs through is generally the same cast material as the rest of the carb body as opposed to having a brass bush in there, so the shaft tends to wear before the "bushes". On the 1.5" and 1.75" carbs there is a brass bush in there that the throttle shaft runs on, brass on brass wears fairly evenly so if you have a worn shaft, you generally have worn bushes too. But quite often you can also get away with just replacing the shaft.

Cheers,

OK mate, how good are you with a drill press?