Originally Posted by gt_mustang
well a tech question here
what do u mean by crank balancing???
In any reciprocating engine, vibrations are produced because of the rapidly accelerating and decelerating mass of pistons and conrods. Even if it is a multi-cylinder engine, the moving pistons may not cancel out each others forces. So a counter-weight is provided to balance the force a little more accurately. If you mess around with the crank by removing any material it'll have to be balanced. These are my two cents!