Last week during a ride, my bike came to a halt. When I pulled off the gas tank, my spark plug was sitting on top of the head and the spark plug wire was blown up. I finally got new parts today and when I went to put a new sparkplug in, it not catching on any of the threads. The spark plug just spins without going in any deeper. How would I go about fixing the spark plug hole? Do I need to pull the whole engine/remove the head?