Arro Exhaust headers / collectors

[Gumby 1100_imp]

The Power Commander (PCV) requires that the O2 Sensor be disconnected. They provide an "optimizer" plug that is installed behind your right side cover. It has a tiny resistor in it to simulate the current draw of the disconnected sensor. Otherwise, your bike would be throwing EFI trouble codes.

I would also think that the changes you made are significant enough to warrant a retune when you can afford the money and time. It may not hurt anything, and you likely are not running any leaner than stock, but a retune would optimize your A/F ratio for better performance.