Hi there all you cbr fans out there! just a small problem which i hope someone out there can help me with?Have a 2004 cbr 600f which i want to fit a pc3,all is going well uptill i go to fit the o2 sensor,can not find the bl--dy thing! if i had any hair i would be pulling it all out by now (lol).Have tried google init ,some say i need one somesay not ,but still not fount out if it has one or not.Your help would be gratefully received.By the way i live in germany not the USA:

 

O2 sensor should be on your midpipe on your exhaust. Its behind the fairing a bit so just look on your exhaust behind your fairing. Hope this helps!

 

If you have a 2004 CBR600F you have a carbuated bike according to the parts fiche. If you have a carb bike there is no O2 sensor only FI bikes use them. If you have an F4i then it's in your midpipe.