Way back when we use balance the rotating assembly on big twins, take most of the shake out of them. But they would lose a tad of hp after the balance. Now you just let them shake and add a fluid balancer if you want to take some bang out it. You really don't feel a big twin shake under power, just at idle. My 1000cc 4cyl is 180 fire, so it swings 1&3, 2&4 to TDC at the same time. Less issue and more power then smooth 90* fire at 10,200 rpm. Just sucks to pull it over by hand when it's freezing outside.

Was this a V 4 or an inline 4.  If it was an inline 4 the math says swinging !&4, 2&3 to TDC at the same time should produce the best overall balance.  Did you run 4 separate pipes or make two 2 into 1 pipes and couple the cylinders that were at TDC at the same time?