according to the info i got the difference is the O2 sensor. The 07 - 09 have one later in the exhaust that the 04-06 dont have. So it depends if the exhaust that you have has a bung on it or if the pipe that has a o2 sensor is included in the kit. I would guess that it's not since the two...
I bought a brand spanking new 2009 fz6 a year ago. I got it for 7k in quebec. Not as far as US and i'm sure they have one or two left. Moto illimite in terrebonne. Look for their web site and give them a call.
A voltmetre measures the diffence in voltage between point a and point b. So if you have 13.6 volts at one pin and 13.6 at another your reading will be 0. You need to take your measurements between your pin and a good ground.