Jibberish71

Hello all Im the first to admit Im a newb!!!With that being said lets get my bike running (lol).I got a cheap 2007 450.00 cheap needs some work the starter just spins the gear it engauges has a few teeth missing, I would like to replace that first can you tell me the name of that gear.
I just want to make sure Im ordering the right part and if you know someone whos selling that gear , point them my way please thanks everyone!!!! edit its not the starter that check out fine its a bigger gear at least six inches across