Many apologies guys if this has been asked before (I'm fairly certain it has). Ok, I relaced the left hand air filter on my 2012 M109R tonight - it got scratched by the garage door, my fault - anyhow, after I'd removed the air filter there was the wire from the O2 sensor just lying there. It's connected to the pipe on the other side, but not going anywhere. The bike has a set of V&H pipes on it. Do I need this re-connected or will it be ok as it is? Any ideas??