Well, that changes everything as far as the jetting discussion goes...LOL!:D

Yeah that is what I was getting at. You have no jets to "Rejet". Programmer is what you need. but you should be fine with out it. The Computer will compinsate for it....to a point.

So that brings me on to my next issue LOL
what are the options for riding with the FMF pipe that hasn't got a o2 sensor bung?.

ive read a few forums that say drill a hole in the pipe, weld on a new bung and do it that way. but thought id ask on here if any one else has had any similar experiences?

narrow band sensor helps adjust ecu with lambda feedback. I'm unsure how it would run without it. It should be easy to add 02 bung at exhaust shop anywhere. mount sensor from side not bottom for moisture issues. good luck
marc

Thought that would be the way around it, ill keep you all updated.

Thanks

So I've finally fitted the fmf powercore 4 pipe, I had bought the m18 x 1.5 O2 sensor bung which turned out far too big for the O2 sensor.

However bolted up the new pipe without the sensor installed, as a tempory measure that has been tie rapped to the pillion foot peg.

After a couple of days I have not had any warning lights etc and bike seems to run as it should.

Although I do have one concern, this exhaust is LOUD!! Is anyone running the quiet core insert in theirs and did it reduce the sound much?

Thanks guys

Attachment 10486

Good to hear it's running good without the o2 sensor. I can't believe your tag is so big. It looks like a lunch tray. :)
marc

Thanks

Yeah Standard size here in the uk, I definitely could do with going down a few sizes.