Shock Absorber Type 643 Competition QRR643 QRR Track focused shock absorber (Kawasaki ZX 6R). Developed for racetrack use, the 643 QRR incorporates the full experience of our racing team and is tailored to the rider a true race replica shock for your ZX 6R. With compression reservoir on a milled mount. The CNC milled upper mount connects the reservoir and houses the high and low speed compression adjusters (22 clicks each). A pressure relief valve prevents hydraulic lock and suppresses