Power commander V / O2 optimiser install
 

I’ve just purchased my 11th XT660X and whilst taking the tank off for general cleaning I’ve noticed a fair bit of wiring purely for the lambda sensor (3 blocks) do I need all this?

Another reason for me looking into this is the speedo is over reading, I’ve heard it can be something to do with the PC5.

Many thanks

p.s I’ve sold the previous 10, I’m not that bad