Since I had the carbs laying around while I wait for my new pistons to arrive, I decided to have a look inside and clean them.
The carbs were very neat inside. There was no dirt in the bowls, and the jets and emulsion tubes were very clean. Everything is std (although each gasket has a different colour).
However, one of the slow jets broke when trying to remove it (see picture). In fact, one of the two tabs where the screwdriver seats went pop, and the jet did not move. Maybe it was installed with loctite?
I applied some car cleaner spray, and my plan is to leave it as it is...
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