This YZ-S5RW2 rear shock shaft from Yokomo is an RC-scale replacement part supplied as a pair, made specifically for the Works'91 TeamSpec layout. The shaft keeps the original mounting interfaces while increasing overall length and stroke versus the previous shaft, a change intended to affect rear-end behavior on higher-traction surfaces.
Compatibility is limited to the supported chassis listed below, so this shaft is intended for direct fitment into the rear shock assemblies of those models. The longer stroke increases rear suspension travel, which can help smooth weight transfer and improve traction during corner exit and mid-corner grip when settings are adjusted accordingly.
Installation overview: the shafts install into the existing shock bodies and pistons of the supported chassis without chassis modification, replacing worn or original shafts to restore intended movement range. When tuning, consider spring rates and shock oil viscosity in combination with the shaft’s stroke change to achieve balanced rear grip and predictable handling.
Use this shaft when restoring Works'91 TeamSpec rear suspension geometry or when tuning for a smoother rear-end feel; verify compatibility with your YZ-W91 series chassis before fitting.
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