Kyosho Mini-Z MR04 RWD Porsche 934 RSR 1976 Vaillant 9 (N-RM/KT531P)

This MINI-Z RWD Readyset includes a renewed 2-wheel drive chassis at its core. Previous Readyset packages incorporated the 3rd generation MR-03 chassis, but the new RWD Readyset includes the 4th generation MR-04 chassis that was first released in 2023. While retaining some basic elements of the MR-03 design, the new MR-04 demonstrated its lower center of gravity and remodeled steering design with blistering speed and excellent handling in the top-of-the-line EVO2 debut model. The MR-04 chassis is mounted with R/C system and features a completed body finished to display model standard. This Readyset includes the same standard MR-04 chassis as other high-end MR-04 models and includes user-friendly 130-class brushed motor and the reliable Syncro KT-531P pistol grip transmitter. Just insert 4 x AAA alkaline batteries into both the car and the transmitter, and you’re ready for the fun to begin. High-performance comes straight from the standard setup, but you can tune up for elite-level performance with a wide range of MINI-Z optional parts. With its dynamic maneuverability display model finish, the updated MR-04 chassis takes the authentic R/C experience to a higher level.
- Authentic EP (electric) small scale R/C car that can be driven indoors.
- Readyset package includes fully assembled chassis, body and transmitter.
- Includes ultra reliable multi-function Syncro KT-531P transmitter.
- Features the MR-04 chassis, a major evolution from the previous MR-03 model.
- Includes high-quality painted body with decals applied, finished to display model standard.
- Geared differential (gear diff) delivers smooth cornering.
- Full ball bearing specifications
- Can be fitted with an optional gyro unit (MZW711) for even easier control. Gyro sensitivity can be adjusted using the volume on the chassis.
- Compatible with wide range of MINI-Z Racer optional parts so you can enjoy tuning and enhancing your model.

While retaining the best aspects of the MR-03, the lower center of gravity of the new MR-04 delivers significant performance improvements. The easier control of the MR-04 makes it an ideal introduction to R/C cars.

New front knuckles with integrated kingpins reduce scrub by 1.5mm on each side compared to the MR-03, realizing sharper and more linear control. The change to 3mm inner diameter ball bearings also reduces rotational resistance.

Front suspension dynamically aligns the camber angle with movement of the upper arm to maintain optimal tire contact during cornering. Revised caster angle also delivers improved steering response.

The car is powered by four AAA alkaline or rechargeable nickel-metal hydride batteries. The batteries are mounted lower than the MR-03, lowering the center of gravity of the entire chassis to deliver improved cornering stability and straight-line handling.

The rear suspension uses a coil spring damper to cushion shocks from the road surface and improve driving stability. It can also be upgraded to an optional oil-filled shock absorber.

Flexibility of the T-bar rear suspension plate that holds the entire rear pod, including the motor and rear axle, produces excellent suspension effect. Optional parts are also available in FRP and carbon.

In 2025, All axles are equipped with low rotational resistance ball bearings as standard. The same size ball bearings are used for both front and rear for spare parts efficiency.

When changing from the standard body, a parts set is included to change the front tread (vehicle width) to match the non-standard body to be installed. Rear tread can be changed by changing the wheel offset.

Includes Syncro KT-531P transmitter with a steering wheel that mimics the steering wheel of a real car and pistol-grip throttle (speed control). Adjust the neutral position of steering and throttle with trims, as well as steering angle with dual rate adjustment. It is also possible to operate in training mode with a reduced vehicle speed (training mode is the default setting).

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