Check for proper throttle operation visually. The slide might not be goin back on it's own because sometimes they are a tight fit (I had to sand one of mine for a half hour before it would even MOVE).

Check to be sure the needle clip is at the second from the top on the needle.

I'm thinking you have the dreaed air leak, fire up your bike and spray some WD-40, water (from a spritzer bottle) or carb cleaner around where the carb clamps to the manifold, and where the manifold bolts to the engine. if there is ANY variance of rpm, you have an air leak. Re-seal the manifold to the jug (cylinder) with some Seal-All or RTV sealant.

Let us know what you find.

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