1980 GS 1100L Rebuild Carbs Or Not

[2BRacing]

The owner of the local bike shop offered to put my carbs in his ultra sonic cleaner and I saw him put them in it....he told me that the carbs would be nice and clean when I picked them up but I wasn’t expecting them to look like they do now and my displeasure with the color/finish was very obvious. I don’t know if the carbs got left in the ultrasonic too long or what happened

In places where the tried-and-tested Berryman's carb dip solution is not obtainable, people have to use alternative cleaning solutions. Some of these will result in that dark colour like on your carbs now. There have been many posts here about this. It is strange that a "bike shop owner" does not know what the correct cleaning solutions are that do not cause problems.