Leave the rebound at stock!!!!! it's perfect, Depending on what you ride,
Offroad, fork setting comp 22 out from fully seated clockwise
rebound 11 or 12 out from fully seated clockwise
shock low speed comp 22 out
high speed comp 2 1/2 turns
rebound 11 or 12 out
moto stock within two clicks either way
you need softer springs for your weight, the kx is sprung stock for a 200 lb rider.
also change your fork oil, the stock fluid is utter garbage.
How do I know
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