Serpent 500901 13mm Shock Piston 2-Hole 1.6mm Replacement  [SER500901]

Designed for 13mm Shock Bodies

The Serpent 500901 piston is built for RC shock assemblies with a 13mm internal diameter and uses a two-port 1.6mm bore profile. It serves as a replacement component or a tuning choice for dampers where oil flow control is part of setup refinement and routine upkeep.

Effect on setup: Port count and bore size set the resistance to oil flow across the piston, which directly affects low-speed and mid-speed damping traits. Choosing a 2-hole 1.6mm piston provides a distinct mid-range flow characteristic that can be used to fine-tune ride compliance and rebound without altering spring hardware.

Fitting guidance: Disassemble the shock carefully, remove the shaft and old piston, then fit the Serpent 500901 unit ensuring thread engagement and o-ring condition are correct. Apply a small amount of shock oil to o-rings and shaft to prevent damage on assembly, then cycle the damper to confirm proper function and eliminate trapped air before reinstalling on the chassis.

Fit checks: This piston is compatible with most 13mm shock bodies that accept replaceable pistons. Confirm whether your shocks use a threaded or press-fit piston and verify shaft diameter compatibility before final installation. Coordinate piston choice with shock oil weight and spring rates for consistent results.