I never here anyone talking about piston weight when going with a big bore kit Does the added weight mess up the balancing of the moter?

 

If they're as big as an old BOAR hog they will. Sorry... I just couldn't resist.

 

the big bore kits I have installed actually "lighten" the bigger piston to be the same weight as stock.

 

I wonder if the balanced moter is more important with piston weight