Shock Absorber Type 643 Competition PS - IDM Preload Adjuster:Mechanical (X-PA) and progressive shim stack for

and progressive shim stack for consistent performance

Springs: Dirt-specific progressive springs optimized for vintage off-road travel and geometry

making it an essential upgrade for serious riders and suspension tuners

damping and spring rate are selected to your rider specifications

The Wilbers suspension solution provides a more responsive fork by replacing the original linear springs with progressive ones

Shock Absorber Type 643 Competition PS - IDM Preload Adjuster:Mechanical (X-PA) and progressive shim stack forIDM spec race shock (race replica). Specially developed for IDM Superbike competition, this shock incorporates our racing teams experience directly into its design delivering a true race replica unit. Includes X PA spring preload adjuster: infinitely adjustable over 15 mm Includes ride height adjustment: shock length adjustable by 5 mm Adjustments: high and low speed compression, rebound 22 clicks each Exclusive finish: milled aluminum parts anodized