All the K11 are ECU controlled. Unless this has been altered I.e. Eprom reprogramed, there is NO WAY you will get one to rev above 7000. Please note that max power on standard setup is around 6000 rpm. If you pass around 6500 rpm 1, you will actually accelerate slower, and 2 its utterly pointless on standard engine. Having a shift light set to 8K does not mean its possible for the engine to rev to 8K.
Remember for maximum accleration, if you were to look at a torque graph you would want to stay within the part of the graph with the maximum area beneath it with reference to the gear you are in at the time.
Ed