Bosses for Lambda Sensors (Oxygen sensors) are not fitted as standard to some aftermarket exhaust.
Models to 2006 require 1 sensor, Models 2007 and Up require 2 Sensors.
We can fit them, supply them for you to fit yourself and we can also supply Lambda eliminators or Electronic fuel and ignition controls.
We would usually recommend that where a bike already already has an oxygen sensor fitted it is preferable to continue to use it in an aftermarket exhaust, in order to continue to obtain optimal overal performance from your bike.
Please Check your model for sensor requirements.