The OHLINS S46PR1C1LS shock absorber is a rear suspension unit built for the Kawasaki Ninja ZX-4R and Kawasaki Ninja ZX-4RR. It replaces the stock damper with a unit that lets you fine-tune compression and rebound to match your weight, riding style and road surface. On a lightweight middleweight sportbike like the ZX-4R or ZX-4RR, that control makes the difference between a compliant ride and a composed one. OHLINS S46PR1C1LS shock absorber: why it matters Engineering for the Ninja ZX-4R and ZX-4RR The OHLINS S46PR1C1LS is engineered around a 46 mm hydraulic piston paired with a 14 mm rod. The piston displaces fluid to create damping force, and the rod diameter determines the stiffness of that force curve. A 46 mm piston with a 14 mm rod is the proportion that suits a middleweight sport bike where the rider wants feel through the seat and feedback at the handlebars without harshness on a bumpy road. The shock is pressurized with nitrogen in a separate reservoir. That reservoir sits apart from the main damper body, so the nitrogen gas does not mix with the hydraulic fluid and stays stable across a full day of riding. The result is consistent damping whether you are in the first lap after breakfast or the tenth lap after lunch. Adjustable compression and rebound for your riding The OHLINS S46PR1C1LS carries adjustable compression and rebound. Compression controls how quickly the shock collapses under braking and cornering load. Rebound controls how quickly it extends after the bump has passed. Together, these adjustments let you dial in the shock to your weight, your riding pace and the road surface you ride most often. If you ride mostly smooth roads, you can soften compression and rebound to let the suspension follow bumps without the bike bouncing. If you ride mountain passes where bumps come in clusters, you can stiffen both to keep the chassis stable and settled. If you corner hard, a stiffer compression keeps the bike from diving under your inside leg and allows