Okay, here goes.

"The fisher damper comes from the world of domestic circle track, and drag racing where they are very effective in damping vibrations from these engines. In the motorcycle world, Fisher dampers are known for their ability to damp out the vibrations of Harley Davidsons-machines that ar designed to vibrate."

"It has an inertia ring that is free to rotate inside a CNC-machined alloy housing that replaces the stock main pulley/balancer assembly. The inertia ring has complete freedom to rotate; it is not coupled to the crank by a bonded rubber sleeve. The ring is in two pieces with springs in between. The ring engages clutches using a special friction material thatis bonded to the inside of the aluminum housing.

Because of the inertia rings' freedom of movement, the Fisher damper is sensitive to the amplitude of the crank vibration instead of being tuned for a certain frequency like a stock rubber bonded damper. The worse the vibration, the more the damper helps attenuate it."

Gotta go for a few, but there is more.

blk.99svt
n.e.Ohio
Never under estimate the power of stupid people in large groups...