Check out previous years KoP checklist's to help you identify them. They should all be accesible by going to the competition manual for each year here:
http://www.usfirst.org/roboticsprogr...-event-results
If that fails, post a picture of it on here and one of us might recognize it for you!
Edit:
Hint - grab a sharpie and write the year on every motor as you pull it out of the KoP! It makes identifying them in the future a lot easier, since you know exactly where to go to get the correct part number.