Hi Clubby,
I have researched this matter in depth and am slowly getting my head around it.
I am in the same position as you looking at a cost effective approach to the exhaust matter. I have asked several people the same questions as you and this is what I understand thus far;
- An O2 sensor is not used on the US spec bikes (Aus bikes do)
- When an aftermarket exhaust is fitted to the US models there is risk that the bike can run lean if a DBK is not used. In some cases they run the Power Commander to ensure the engine does not run lean.
- On Aus models the ECU requires an input from the O2 sensor which it uses to determine the correct mixture. If you do not run the O2 sensor you will get a full rich signal which is not good.
- The O2 sensor installed and functioning correctly should eliminate the need install a power commander to adjust mixture.
I am looking at three options at the moment;
- Marthy's option from this site however it is a bit of effort chopping current system which is not ideal as I want the original as a back up for resale purposes etc.
- The TB option you have chosen which as you have highlighted does not cater for an O@ sensor install
- Third option is looking good. Guy in perth is selling an IXIL full system which will bolt straight in and as I understand has the O2 sensor mount.
The IXIL system is advertised for an XJ6 however I have been reassured that it will fit the FZ6R with Fairings.
The one thing that concerns me is that I have not seen anyone on the forum talking about the IXIL system to fit the FZ6R and it hasn't really come up in discussion on the various exhaust threads (that I've seen). It would be great if someone on the forum who has tried this could chime in and confirm if they had fitted this to their bike.
Good luck with the install.