Starter is just spinning?

[slipknot2live]

I hit a big bump on my jcl 250a and my engine sputtered all the way back to the house. I had to restart it 3 times before the driveway.... I went for a closer look and found that my intake had been knocked looose, which I repaired but on the 3rd attempt to start it, my started just made a whirring sound...I have a charged battery, and I tried jumping the started off the solenoid and it made the same sound.
Any ideas?