Carb overhaul
How was the carb working before you took it apart? If you can find a shop that has a exhaust gas analizer, it would be worth a quick check to see how it is running especialy at idle. This will tell you if the needle and nozzel are worn because it will show up as a rich condition at idle. The needle and nozzle on most bikes are sold as a set. Change them by tapping (lightly) down on the nozzel so it comes out thru the float bowl. My experience has been that lube on the vacum slide will cause sticking a short while later on. I polish them with a scotch brite nylon pad (we use them for scrubing dishes) if you push the slide up with a finger lightly it should fall down on it's own. Really check the diaphram on the slide for any cracks or tears, they can be patched for a few thousand km with plastic and glue or buy new ones for big money. Remember repair work is 90% patience and 10% special knowledge and tools.
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