Pitching Damper Tuning Parts for YR-X12 & YR-X1219 - Yokomo YX-40CY  [YX-40CY]

Tuning parts for pitching response

This Yokomo YX-40CY set contains the cylinder, the AJ adjustment nut and replacement O-rings used in the pitching damper of 1/12 on-road race cars. It is supplied as an aftermarket tuning component to influence pitching response and spring preload on compatible platforms.

The cylinder carries a Kashima-style hard anodized finish to cut friction between piston and bore during stroke, helping keep damping characteristics steady. The kit is aimed at component replacement and fine adjustments rather than a full damper rebuild.

Fitment guidance: replace worn O-rings and verify sealing post assembly, set the AJ nut to attain the desired preload, and confirm unrestricted piston travel before track use. Check components after a few runs to monitor O-ring condition and surface wear.