What's in the power up kit? 11 TE310 2011

Bought the bike used and I'm not sure what the kit actually consist of and what it does. The previous owner mentioned it and may have installed most or all of it. What should I look for. Thanks

A plug in the exhaust header where the o2 sensor was is an indicator it is powered up.

Thanks rancher1, The header has something that resembles a brass fitting with multiple holes in it that must have a plug in it. The bike seems to have more power than 27hp reported. It also has a JDJetting module under the seat. Im not sure about whether it has the TXC swaps on the ECU or Fuel Injector.
Is there anything else that was included in the power up kit?

While reading an unrelated post on another site I found
Full power instructions, TE-TXC 250 MY10-11, TE 310
Here's the instructions.

1. Remove the throttle stop on the throttle body.
2. Replace the restrictive air filter plate with the open one.
3. Remove the Oxygen sensor on the header and install the plug.
4. Remove the catalyzer between the silencer and exhaust manifold.
5. R&R the rear sprocket with the 50 tooth.
6. Remove the Decibel reducer and replace with the shorter one.

After completing all of these the Mode switch will now be functional. "I doubt the sprocket change is required"