KTM 400 too lean?

Any recommended changes from stock settings for a 2004 400EXC would be most appreciated...seems too lean out of the gate.


Try turning the fuel screw outwards and if that doesn't work, adjust the needle clip position richer.

We have jetting kits for your bike available from the Thumpertalk shopping cart by picking the the banner ad at the top. The kit helps by richening the jetting evenly over the throttle ranges where it needs more fuel, but not excessively.



Thanks James, I ordered one of your kits a few days ago but it has not shipped yet and I am hoping to make some adjustments that will improve performance until it arrives.

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