Yokomo Z2-300RUW Rear Upper Mount and Weight for YZ-2  [Z2-300RUW]

Stabilise the rear upper arm and add adjustable ballast

This aluminium rear upper suspension mount is manufactured for the YZ-2 2WD platform to clamp the rear upper arm more firmly and reduce torsion during rear roll. The firmer fix helps the rear maintain correct alignment under cornering loads.

The assembly ships with two removable 6g weights that can be fitted to increase load on the rear axle. Adding rear mass is a tuning choice to influence rear traction and corner entry on slippery or loose surfaces.

Fitting follows common YZ-2 service steps: remove the original rear upper mount, locate the Z2-300RUW in place, and secure using the factory mounting points. Check all fasteners after the first runs and again after impacts to ensure continued secure attachment.

Tuning guidance: trial a single weight to judge handling change before fitting both. Confirm the weights do not obstruct suspension movement or contact drivetrain items and inspect mounting screws after track use.

Compatible Models

• B-YZ2CA
• B-YZ2DTM

A precise tuning component for drivers seeking a firmer rear upper arm mount and the option to bias weight rearwards on YZ-2 cars; make changes incrementally to find the optimal setup.