Kyosho MR-03 Narrow Front Upper Suspension by 3Racing MR3-19/BU  [MR3-19/BU]

Mini-Z MR-03 narrow front upgrade

This 3Racing MR3-19/BU item is an RC-scale narrow front upper suspension component intended for Kyosho MR-03 Mini-Z chassis maintenance and tuning. It provides a narrow-profile front linkage geometry that influences steering feel and handling balance without implying any real-vehicle application.

Compatibility is limited to MR-03 family setups that accept the narrow front upper arm form factor, and the part functions as a direct replacement or tuned alternative to standard upper suspension links when the chassis layout supports it.

Installation is straightforward for hobbyists familiar with Mini-Z service: remove the original upper arm, inspect ball studs and bearing mounts, fit the MR3-19/BU arm in the same orientation, and verify steering travel and toe settings before test runs. Adjustments at the servo and sway link level may be required to restore desired geometry.

Tuning role: this narrow front upper arm changes the front-end geometry enough to affect steering responsiveness and turn-in behaviour, making it useful when adjusting front-end grip, steering centring, or when fine-tuning for a specific track feel in Mini-Z scale setups.