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Message: [QUOTE="Mac, post: 106688, member: 18503"] Dont assume that running overly rich is better for the bike. It will cause the power valves to gum up and fail, spark plugs to foul, spooge covering your silencer and rear fender, poor performance and poor gas mileage. Jet the bike SLIGHTLY rich to cover temp and altitude changes but dont use the stock jetting it's way too rich on the 200. Try a 155main, 45 pilot, clip in #2 and a/f screw @ 1.0 - 1.5 turns out. That should still be slightly rich but give you a much better running bike. :) To really jet the bike correctly you should read [url]http://justkdx.dirtrider.net/carbtuning.html[/url] [/QUOTE]