I got a 2008 gsxr 600 with code c28 plz help me

I want to help you keep your machines running so you can keep riding with your friends and families

This is what I will be hopefully getting fully restored and up and running for biketoberfest 26. Never done motor and clutch just always stuck to the basics. Oil change and filters with spark plug. Other than that. That’s my so called expert knowledge. lol. Any help would greatly appreciate it through the process.

What’s your weapon of choice