I had not considered adding mass as primarily means to lower vibration unless needed to balance out the reciprocating mass (piston & rod assembly). Otherwise, I’d just be creating more vibration rather than less - most likely.
It’s difficult to tell as they don’t balance out counter balancers in general although they do for a Honda 250. Truthfully, I’d spend the money to balance out every reciprocating hunk if metal in the engine if I could. Sure, it costs money, but my donated kidney means a lot mitre to me then the small amounts I’m putting into the engine. I’m not going to give up motorcycles though. Not until I’m physically incapable of riding.
Sent from my iPhone using Tapatalk