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2000 Arctic Cat 300 Stuck Choke?


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I have a 2000 Arctic Cat 300 that starts fine and runs fine at low rpms. It puts out black smoke and cuts out at high rpms. The plug looks black and fouled like it is running too rich. Putting the choke on when riding at the highest rpm it will run smoothly at seems to make no difference. I have taken the choke apart, and it seems to operate ok. Is there a way to "lube" the choke so it slides more easily? what am I missing?

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