Carb cleaner doesn't hurt the bearings at all. It is formulated for aluminum and

pot metal carb bodies.  It will turn a heavily crusted rotor shiney bright. You
still will have to use a brass brush to clean the side seal grooves. And some of
the side seals are a pain to get out even after soaking

for several days.

Royce

Royce, you need to be careful with carb cleaner on bearings.
common "pot metal" for carbs is mostly zinc/tin not highly reactive. 
(to carb cleaner) Most babbit has lead/antimony compounds, which MOST carb 
cleaners won't attack, but some will. Aluminum is no problem in 
either case. Not being a
worry wort, just better to be careful. Bill Jepson

 
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