This Yokomo YX-22L rear roll shock mount is an aluminum left-side mounting part made for competition 1/12 scale YR-X12 chassis. It secures the roll damper to the rear section of the chassis and defines the mounting point used when adjusting roll resistance and rear chassis balance.
On installation, the part replaces the original left-side roll shock mount and uses the same mounting locations on the YR-X12 and YR-X1219 chassis. Inspect the mount points and alignment during reassembly to ensure the roll damper sits square and the linkage operates without binding.
In tuning practice, this mount is a hardware-level component that affects how the roll damper transmits forces into the rear suspension geometry. Swapping or inspecting the mount can be part of routine maintenance or setup changes aimed at refining body roll and transient response in competitive 1/12 racing setups.
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