YZ-2 Rear Upper Arm Mount & Weight - Z2-300RUW by Yokomo  [Z2-300RUW]

Secure rear upper arm and tune rear bias

This aluminum rear upper suspension mount is intended for the YZ-2 2WD platform to lock the rear upper arm more securely and cut down on twisting when the car rolls. The firmer mount helps keep the rear geometry consistent under side loads.

Included are two small weights (6g each) that bolt into place so you can add rear bias as needed. Shifting weight rearward can improve traction at the rear wheels and change corner entry and mid-corner behaviour on low-grip tracks.

Installation follows standard YZ-2 procedures: remove the stock rear upper mount, fit the Z2-300RUW into the factory points, and tighten. Check screw torque after the first run and after any heavy impacts to maintain secure attachment.

Setup tip: begin with a single weight and evaluate before fitting the second. Confirm that the added mass does not impinge on suspension travel or drive components and inspect mounting hardware periodically.

Model Fitment

• B-YZ2CA
• B-YZ2DTM

Ideal for racers seeking a firmer rear upper arm mount and the option to tune rear mass on YZ-2 based cars; adjust weights gradually to dial in handling.