740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
The lateral forces produced by the action of the pistons at TDC and BDC cause the engine to pivot about an axis located approximately at the midpoint
of the block. The balance shafts are located at different heights on the block to counteract the resultant moment. The forces due to the balance weights
combine to exert a moment opposite to that caused by the pistons.
Cancelling the moments produces smoother running in this respect also.