Dan,
How prevalent is this in the carbs you see? Curious as I can still get those arms fairly cheap.
Regards,
Scott
The wear pattern, to some degree, is normally in most parts that are originals to decades old carburetors unless they have been repaired before.
Many of the commercially remanufactured carburetors I have handled received new rocker arm levers during the process. An issue with originality is that some new parts that get installed are not the same as what the carburetors originally had. Some world famous shops will send out a carburetor with a rocker arm that has been recolored with some type of finish or another without doing anything to the wear pattern they covered up with fresh blackening.
This for sure is not a how to but these rocker arms can have other problems also. The typical one is the finger over the plastic cam gets bent up into a curve or just up at an angle. Either way the angle change affects geometry and shot timing. The rare problem is the lever over the accelerator pump cover rocker lever is bent up (part is twisted). I just repaired a carburetor for a friend with both issues. The carburetor was ?restored? by a very well known person. The fine details of the rocker arm made me think it was a reproduction part including that it had zero wear from a plastic cam rubbing on it. The carburetor had enough reproduction parts in it and two had serious functional / dimensional issues, both throttle shafts assemblies, that a low quality reproduction accelerator rocker arm lever with functional / dimensional issues would not be unexpected. The bend and twist issues were easy to correct. (The carburetor had lots of functional problems, but looked nice.)