Yokomo YX-40CY Cylinder/AJ nut/O-ring set for pitching damper  [YX-40CY]

Pitching damper cylinder and tune parts

This Yokomo YX-40CY kit provides the cylinder, AJ adjustment nut and replacement O-ring components used in the pitching damper assembly of 1/12 on-road competition models. It is an RC-scale accessory intended for tuning the pitching response and spring preload of the damper system on compatible chassis.

The cylinder surface is treated with a Kashima-style hard anodized finish to reduce friction between piston and cylinder during stroke, helping maintain consistent damping feel. The kit is focused on parts-level replacement and small adjustments rather than a full damper overhaul.

Installation notes: replace worn O-rings and recheck sealing after assembly, thread the AJ nut to set the desired spring preload, and verify smooth piston travel before track use. Routine inspection after a few runs is recommended to monitor O-ring compression and finish wear.