Shock Absorber Type 642 Competition Preload Adjuster:Hydraulic Preload Adjuster (Wilbers-PA) (+$505) Installation requires professional expertise and

Installation requires professional expertise and specific tools — contact a trained dealer if necessary

Gas and oil are mixed in the main body

This shock absorber connects its compression tank to the main body using a flexible steel hose

they are fully adjustable

the Wilbers solution delivers a noticeably smoother and more precise fork response

Shock Absorber Type 642 Competition Preload Adjuster:Hydraulic Preload Adjuster (Wilbers-PA) (+$505) Installation requires professional expertise andThe ultimate in motorcycle shock absorbers: the upper mount is a precision milled component that connects to the compression reservoir and houses the high and low speed compression adjusters. With 22 clicks each, they can be dialed precisely to your needs. A pressure relief valve prevents hydraulic lock at maximum compression speed and mitigates uncontrolled jolts. Rebound is externally adjustable in 22 clicks, and spring preload is steplessly