The Yokomo D-156UM is a front upper mount made for the DPR series upper A-arm, offering six selectable pivot positions to alter the upper link geometry. It is intended for RC-scale drift package setups and fits the DP-DPRA and DP-DPRH chassis.
Changing the pivot location provides incremental shifts in the front roll centre and link leverage, which can affect steering feel and transient roll during cornering. Use small step changes when testing to identify the desired balance between initial steering bite and mid-turn stability.
Installation replaces the existing upper mount on the DPR upper A-arm and uses the chassis' original mounting points, so basic tools for suspension linkage removal are sufficient. After fitting, verify arm travel and steering clearance before a full run.
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