I have a 2005 Polaris Predator 500 Troy Lee and when I push the starter button there is clicking noise coming from under the battery what could it be?

 

Does it start? If not could be a faulty solenoid on the side of the battery box.Just use a test light or meter to see if the starer wire is getting power. If it's not the solenoid,then the regulator is mounted under the battery box also. Items #29 and 31.Dirt Cheap Yamaha, Polaris, Suzuki & Kawasaki OEM Parts & Accessories – Cycle Parts Warehouse