With PowrPro you can say good-bye to old-school EFI "mapping mania" and O2 sensor hassles forever. When your bike accelerates, PowrPro reads the engine's performance up to 80 times per second to optimize fuel delivery at all throttle openings under acceleration, under every kind of load and under all existing environmental conditions to deliver maximum acceleration No dyno testing to determine the right map No confusing computer-mapping downloads to select and install No welding hassles with O2 sensors or costly pipe changes PowrPro will always supply optimum fuel ratios wherever you find yourself riding tomorrow, next month or next year