Yokomo S4-203PA Graphite Servo Mount Plate for YZ-4S, graphite servo mount for YZ-4S and B-YZ4SF chassis  [S4-203PA]

Graphite servo mount plate for YZ-4S

This is a graphite servo mount plate designed for the YZ-4S platform and related chassis. The plate serves as a lightweight, rigid mounting point that locates the servo relative to the centreline and steering linkages, helping maintain consistent steering geometry during tuning.

To install a servo using this plate, the manufacturer notes it must be used together with the inner post and outer post hardware listed in the source, specifically the inner post (S4-203A?1, 900) and the outer post (S4-203AO?900). Those posts are separate items and are required to secure the plate and the servo in the chassis assembly.

Practical installation tips: verify servo spline alignment before tightening, use appropriate-length screws for your servo case, and avoid over-torquing to prevent crushing the graphite. Confirm the plate orientation matches the chassis mounting points and check linkage travel after final assembly. As an RC-scale accessory, this plate affects servo positioning and steering response rather than motor or drivetrain performance.

Tuning role: changing the servo mount location or stiffness can influence steering centring and transient response. Use the plate as part of a broader setup workflow when adjusting toe, steering rate, or servo throw to dial in handling for track conditions.