Just about to eat dinner,but want to help.We had our holiday july 1st.,guess yours is today.Is this motor internally balanced or external?Is flywheel new?,is it sfi approved?If it has weights on one side it is externally balanced.Your builder should have went through this with you.This is VERY important.you do not want to mix this up,you will wipe out the bottom end.If you mix this up & start engine the only good news is you will notice right away by the awful vibration.Don`t test it,more info needed.