I took my carbs off today to clean the pilots. Looking at the intake ports on the engine, there is a little oil in both intakes. Looking at the butterflies on the carbs' exhausts, there is some black oily crud on the butterflies:
(http://gs500.specialgreen.com/img/butterflies.jpg)
Is this normal?
I cleaned it up. It turned-out to be a substance like tar: stiff and very sticky. I had to use liquid wrench on a cloth to get it, and the throats around the butterflies clean.
Now that you've already cleaned it off ( :oops: ) I'd have to say that NO ... it's not normal.
being that it's on that side of the carbs do you think it could be a ethanol issue? some kind of additive that is building up?