Shock Absorber Type 640 RoadThe Kawasaki ZX 6R (ZX636G) comes equipped with linear fork springs from the factory. The Wilbers conversion also utilizes linear fork springs, but with a slightly higher spring rate for improved performance. Additionally, the conversion uses Wilbers Zero Friction fork oil with an adjusted air chamber, optimizing damping, negative spring travel, and overall response behavior. Due to the ZX 6Rs track oriented design, Wilbers offers fork springs in
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