This rear upper arm mount is produced to suit the 1/10 4WD YZ-4 platform. It locates the top of the rear suspension arm and integrates with the standard YZ-4 rear suspension geometry.
The included caster-adjustment bush gives selectable angles at 0 degrees, 2.5 degrees and 5 degrees. Altering the bush shifts the rear axle inclination relative to the hub, enabling straightforward tuning of steering feel and straight-line control without swapping the suspension arm.
Fitting follows the YZ-4 rear mounting points and uses the original chassis fasteners; no modification to the chassis is necessary. Maintain the original torque settings on bolts and verify there is adequate clearance once fitted.
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