If the bike turns over strong when you crank it on good battery, then there is no possible way that you are looking for at a starter issue.
All the started does is spin the motor when you push the button. If the bike is turning over then, like I just said, no issue with starter.
And yes, I would hook it up to jump it first. My posts may seem like I am jumping ahead of myself, but I am just assuming you will try (or have already tried) the other stuff I mentioned in order first.
