I just got a 13:1 piston put in my bike during breakin it was ran easy up the road about 1/4 mile and then back and then back down the road again maybe 1/8 of a mile and back. Then on the way up the driveway it stalled. Started it back up and got to the yard and it died. So we tore it back apart and the 2 intake valves are bent. Everything was put back together correctly. Question is should i have gotten my valves adjusted with the new piston? And how much do the valves run?