Ok so I went riding today for the first time since I installed the pipe jets and intake and the bike ran fine all day. It did sputter a little in the mid range but besides that it was ok. On the last run of the day it stalled and wouldnt start back up. We had to push it out the woods to get it out. I got it home and checked for spark which I have and there is fuel in the bowls. When it cranks it makes a clacking almost crunching sound. I don't have a compression tester what are the odds i snapped a valve or something let loose?