Shock Absorber Type 643 QRR - IDM Preload Adjuster:Mechanical (X-PA) Options: hydraulic preload adjuster (Type

Options: hydraulic preload adjuster (Type 625) or mechanical X-PA adjuster

– 2× Harley-Davidson top-out springs

– Radial-piston design with progressive shim stack

These have been replaced by progressive fork springs

The negative spring deflections are slightly too low in the stock configuration

Shock Absorber Type 643 QRR - IDM Preload Adjuster:Mechanical (X-PA) Options: hydraulic preload adjuster (TypeIDM race replica shock with finned reservoir. Specially developed for IDM Superbike competition, this shock uses an integrated finned expansion reservoir for superior oil cooling and a constant damping curve. Our racing teams development work feeds directly into the rider specific setup a true race replica shock. Features: X PA spring preload adjuster: stepless 15 mm range Ride height adjustment: shock length 5 mm Adjustments: high low speed