YZ-W91 Series Rear Shock Shaft Upgrade for Works'91 TeamSpec - Yokomo YZ-S5RW2  [YZ-S5RW2]

How this shaft changes YZ-W91 handling

The Yokomo YZ-S5RW2 rear shock shaft is supplied as a matched pair and built for the Works'91 TeamSpec application. It retains the original mounting geometry while extending shaft length and stroke compared to the prior version, a modification aimed at altering rear-end behavior on higher-traction tracks.

Fitment is limited to the chassis models listed in the specifications below; this shaft is intended for direct insertion into the rear shock assembly of those models. The added stroke increases suspension travel at the rear, which can aid traction and make weight transfer through mid-corner and corner exit more controlled when dialed in correctly.

Installation notes: shafts replace the existing rear shock shafts and do not require chassis modifications when used on compatible models. When adjusting for the increased stroke, pair spring choices and oil viscosity with the shaft change to get the desired rear grip balance.

Select the YZ-S5RW2 for tuning setups that need extra rear travel on Works'91 TeamSpec cars; always confirm your YZ-W91 series model is supported before purchase.