Street S46 Shock Yamaha 2018-2020 FJ-09 The STX46 Street Performance Line is based on Öhlins classic monotube design and developed for naked sports bikes, street performance bikes, and Adventure bikes. It features a large 46mm main piston and a gas reservoir that can be within the main body or external using a hose or piggyback mounted reservoir. With adjustable damping, you can change the behavior of the shock to suit your taste and even fit a hydraulic spring pre loader to change the stance of the bike. Depending on the application, the shock absorber features a mechanic or hydraulic preload adjustment as well as adjustable rebound and compression damping. Tech Adjustable Rebound Damping Hose Mounted Hydraulic Preload Adjustment Monotube Shock with internal Reservoir High Pressure Nitrogen Gas Charged STX Single Tube design 46mm Piston Diameter Adjustable Preload w/ Billet tool Multiple Spring Rates available to accommodate a wide range of riders Top Level Comfort, Rideability, and Performance Hard Anodized - Precision CNC-Machined Components Low-friction Shaft / Seal Head design Fully Serviceable and Repairable