If you unplug and remove it you will get a check engine light. You can remove it but you'll have to disable the servo with ecmspy or you can go on ebay or americansportbike and order the "exhaust valve emulator"http://www.ebay.com/itm/BUELL-XB12-Exhaust-Valve-Emulator-2003-2009-model-/271003523575?pt=Motorcycles_Parts_Accessories&hash=item3f191199f7&vxp=mtr