With a 172 main & 42 pilot, I'm surprised it's still rich. Stock needle? What clip position?
You said you're running your oil @ 1% ? That's a ratio of 100 : 1, correct?
Bear in mind that a mix ratio of 100:1 results in more fuel in the combustion chamber as compared to a mixture of 50:1
(Richer v. Leaner has to do more with the volume of fuel than the volume of oil in the fuel).
Running a higher ratio of oil in your fuel will actually result in a leaner fuel mix to the engine.
Could there be a noise (and air) reducing cover on the air inlet?
The '08 DE I referred to in my earlier post has an FMF Gnarly and TC II S/A.
How many hours on the bike so far?
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