A general misconception in shim stack tuning is the high speed stack controls high speed damping. That creates the perception removing shims from the high speed stack “loosens-up” high speed damping.
Ride tests of the “jake norm” stack determined the setup needed softer high speed damping to get better ground compliance. Jake wanted to replace the stack taper with a straight stack of six shims with the thinking the softer high speed stack would “loosen-up” high speed damping.
MXScandinavia ran the dyno test and the two configurations (data points) show no difference in damping. Shim ReStackor calculations (shown by the lines) show the same thing.
To get softer high speed damping while keeping low speed the same requires using a ring-shim to preload the stack (linky, fundamentals).
