The Yokomo YZ-S5RW2 rear shock shaft is supplied as a pair and intended for the Works'91 TeamSpec arrangement. It preserves the original attachment points while increasing shaft length and stroke compared with the earlier version, a change that will influence rear behaviour on grippy tracks.
Fitment is limited to the chassis listed below; install this shaft directly into the rear shock assemblies of those models. The greater stroke provides additional rear suspension travel, which can assist with traction and smoother weight transfer when your setup complements the change.
Installation guidance: the shafts fit into existing shock bodies and pistons without requiring chassis modification, replacing worn or original shafts to restore the intended movement. When changing to the YZ-S5RW2, evaluate spring stiffness and damper oil viscosity to maintain a balanced rear grip profile.
Fit the YZ-S5RW2 to restore or tune rear suspension geometry on Works'91 TeamSpec cars, ensuring your YZ-W91 series chassis is supported before installation.
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