Can anyone help me with the flat spot that I am getting at 2500rpm? I've replace plugs/wires, new TPS, I have reset the tps many times, to no avail, btw I have a 2003 xb9r with K&N & with race muffler. If I retrieve the fuel maps and shut off the O2 sensor it seems to run a bit better, so should I replace the O2 or just run it by passed, or is there something that I'm not seeing?..thanks