I can run faster than your GN with a good pair of Nikes!
J/K, hail to the GN.
If you do decide to tear into the motor (which you should have already been half way done with by now) make sure to take the head bolts out in the right sequence or you risk deforming the head. Also, take a picture of everything before you touch it.
But tear into it already, it's just a motor, it won't bite.