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Message: [QUOTE="CraigW, post: 167359, member: 20080"] I have just purchased a 2001 FE400E. Its really a great enduro bike with awsome handling and suspension. The only problem I have so far is one of jetting. If the bike is idling and one very slowly twists the throttle, the motor rpm will drop slightly before increasing. If one twists the throttle very quicky, the response is fine with the motor reving very quickly, no lag being detected. The problem manifests itself on tricky downhills where the motor stalls regularly. During normal riding, from 1/8 throttle up bike response and performance seems normal I have tried to increase the idle speed to no avail. I have tried different adjustments on the air screw, also without success. Currently it is adjusted to only a 1/4 turn out. This doesnt seem right as the manual says 1 1/2 to 2 1/2 turns is the normal setting. In fact the motor idles at its highest when the screw is fully in ??? I typically ride at altitudes from sea level to 800m. The problem seems worse at higher altitudes. Questions: Does the mixture screw lean out as you screw it in, or visa versa? Could my floatbowl level be too high? Do I have the wrong jetting ie too rich/lean at low rpm? :think [/QUOTE]