Internal or External Balanced Harmonic Damper?

There may be 2 weights: be sure to use the LA and not the magnum weight, they are different if you go that route. And to say the motors were balanced at the assembly line is not quite accurate on the neutral balanced motors. Everything was neutral balanced so they just stacked up a bunch of zeros to get a bigger zero (out of balance) on the 273-318 and the forged 340 motor. The cast motors had to have an extra weight on the balancer to make up for the lighter cast crank material. It was a general weight offset, not run on a balancer or anything. Production balance was pretty good but not even close to a "balanced" motor.