Yokomo YOKYX40O - YRX 12 silicone diaphragm for pitching damper  [YOKYX40O]

Pitching damper diaphragm for YRX 12

This Yokomo YOKYX40O silicone diaphragm is an RC-scale replacement part designed for the YRX 12 pitching damper assembly. It serves as the flexible membrane that controls air and oil flow inside the pitching damper, influencing initial pitch resistance and transient response during acceleration and braking on 1/10 on-road models.

Made of silicone material, the diaphragm offers consistent elasticity compared with worn stock parts, helping maintain predictable pitch characteristics without modifying shock oil or springs. As an accessory part, it is intended only for radio-controlled chassis and damper systems, not for any real vehicles.

Installation is straightforward for those familiar with damper servicing: remove the damper end cap, replace the old diaphragm with the new unit ensuring correct seating, and reassemble while checking for leak-free sealing. Keep the part free of dust and sharp edges during fitment to avoid premature wear.

In tuning, swapping diaphragms is a subtle adjustment tool. A new or firmer diaphragm can reduce nose dive and improve transient stability, while a softer or aged diaphragm may increase initial compliance. Use diaphragm changes alongside oil grade and spring adjustments to achieve balanced handling.