You should listen to me. No, seriously, listen to me.
Join Date: Oct 2008
Location: Santa Barbara
Motorcycle: Blue 2006 GSX-R1000
Re: Needing help
What displacement? Is the click coming from beneath and slightly behind the seat? That would be the starter solenoid. Find it and measure the voltage on the terminal associated with the big black cable to the starter. It should be zero until you press START, when it should jump to the battery voltage while cranking. Download a service manual for the bike. There's a diagram for the starter system on page 9-12. It should be easy to track down why it won't crank.
Possibilities include a failed solenoid, though they're fairly robust. How did you test the starter?