Re: to pc3 or not to pc3 that is the question???
Make sure you hook the small black wire to the battery post -Ground.
No oxygen sensor needed.
Is that a serial port or usb?
You'll find out what map is on the Power Commander when your hook your laptop up to it.
You also need to go to DynoJet.com and look up for the free software download so you computer has a program to work with the power commander unit.
Here's the thing that I see with your setup. You're increasing the throttle body size, right? Are the 954's bigger? better or more jetting? increased fuel rate?
I don't know, that's why I'm asking, but nonetheless, you're modifying the fuel consumption of your engine, of course you have to match the fuel map to compensate. That's exactly what the PC will try to do. It's up to you to load the right map. Whether it's a canned map or a dyno tune, you need different fueling. If you want to go by seat of your pants feel, than experiment with the different maps out there, if you want to take the guessing game out of it and make sure your bike is running really proper, then go to a dyno. A reputable one. Do a little research.