Yokomo S4-203PA Graphite Servo Mount - Compatible with YZ-4S and B-YZ4SF  [S4-203PA]

Graphite bracket optimised for YZ-4S chassis

This graphite servo mount plate fits YZ-4S and the related B-YZ4SF chassis. Its stiff, lightweight construction aims to maintain servo location under load so steering geometry remains stable during cornering and setup changes.

Fitting notes: the design must be paired with the inner and outer post hardware listed by the maker, specifically inner post (S4-203A?1, 900) and outer post (S4-203AO?900). These posts are separate parts and are necessary to anchor the plate and servo into the chassis assembly.

Care advice: inspect spline alignment before final tightening, pick the appropriate screw lengths for your servo shell, and tighten incrementally to avoid over-compressing the graphite. Confirm the plate faces the correct way on the chassis and recheck linkage travel after assembly. The accessory changes servo positioning and steering characteristics rather than motor or drivetrain output.

Setup influence: altering the mount point or the plate stiffness will affect steering centring and transient response. Include this plate in a wider setup routine when tuning toe, servo rates, or throw for grip levels.