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Harley-Davidson Pan America RA1 – Suspension Optimization
much harder rate to be reached too quickly
Due to the ZX-6R’s track-oriented design
The stock setup offers slightly too little negative spring travel
and preferences
Shock Absorber Type 643 Competition PSD Shocks Harley-Davidson Pan America RA1 –643 QSD Diagonal, traversable reservoir. Originally developed for the Honda VFR 1200, this Competition shock adds a diagonally mounted, rotatable compression reservoir to the Wilbers construction kit, unlocking multiple mounting options on bikes with limited space. The upper mount integrates the high and low speed compression adjusters for precise damping control. Spring preload is continuously adjustable with the supplied spanner or, optionally,
