Hi!
I have a 2001 CBR600 FS1 with an aftermarket exhaust. I welded a nut on it, and installed the O2 sensor, but cannot find where to connect tha cable on the other and. Could someone make a photo about where to connect it, or explain it to me? thank you (my english is bad and i should feel bad )

 

The idle adjuster is literally right next to where the o2 sensor plugs in, you have to wire it above the rear shock. If you look at your left side fairings you'll see the idle adjuster if you grab inside there, right next to it is where the o2 sensor should plug in. I would have just used a o2 sensor eliminator. That's what i did with my dan moto exhaust, I paid $15 though instead of doing the resistor mod.