[Andy]

I had my rotating assy balanced and they ruined everything. I had the repacement parts balanced also. The guy wanted to balance the rods by adding washers. I recovered the parts and went to a third place. The engine is not as smooth as my unbalanced one. These engines do not turn ten grand and the factory balance is great. The only thing I would do is check the rods and match the weights if way off. Buy a digital scale at HF and weigh the rods and pistons yourself.