Quote:
Originally Posted by Dimman
Do the shim stacks fatigue and stop working over time/use?
ZDan's complaint sounds like a text book example of orifice damping as used on older motorcycle front forks. It's like a squared curve, er... Math squared or exponential or something. Starts horizontal-ish and quickly moves to vertical-ish.
Shims are what modify that curve, right? So they have an oversized orifice that they 'choke back' at low speed with shims that deflect and 'blow open' at high speed, which gets you (a very simplified) digressive curve.
So are shim stacks a part of r and r for an overhaul revalve?
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I don't think that new shim stacks are part of "normal" R&R for a regular rebuild. Yes for a "revalve" the shims would be replaced to alter the curve by changing the amount of force before they deflect.
- Andy