Off-Road Damper Piston Yokomo YS-8-142 F. Shock Piston 1.4mm Bore  [YS-8-142]

Off-road shock piston replacement

The Yokomo YS-8-142 F. Shock Piston is an RC-scale replacement piston intended for off-road shock assemblies. It adjusts the internal oil flow within the damper body to help refine rebound and compression feel without replacing other shock components.

Installation is straightforward for anyone familiar with threaded shock bodies: disassemble the shock, remove the shaft and spring, replace the piston, and reassemble using your existing seals and shock oil grade. Even small differences in piston size or porting affect oil flow, so this part is best applied to tune mid-range and low-speed damping rather than to expect a complete performance change.

Use a methodical tuning approach: change one variable at a time, test on a consistent surface, log handling differences, and only then experiment with different oil weights or spring rates. That keeps setup adjustments consistent and repeatable.