Experience high-performance RC racing in a compact package with the Kyosho MR-04 RWD Mini-Z Chassis Set with KT-531P Transmitter. Designed for enthusiasts who want to personalize their Mini-Z racer, this set provides a versatile MR-04 RWD chassis paired with a responsive KT-531P pistol-grip transmitter. With compatibility for Auto Scale Collection finished bodies or unpainted bodies, this set is the perfect starting point for building a truly custom Mini-Z vehicle. Whether you’re new to the Mini-Z world or a veteran racer, this chassis delivers precision and performance out of the box.

About the MR-04

Advanced MR-04 Chassis for Improved Handling

The MR-04 chassis introduces multiple upgrades over its MR-03 predecessor, including a lower center of gravity and improved steering geometry. These enhancements provide sharper, more predictable handling and better cornering stability, essential for on-road racing. The W-MM (wide, mid-motor) configuration also gives users greater tuning potential, making it easier to optimize performance for different track layouts.

Ready for Customization

Ideal for drivers who want to create a one-of-a-kind Mini-Z, this set is fully compatible with Kyosho’s extensive range of Auto Scale Collection bodies and unpainted white kits. You can paint your body to match a real car or your own racing colors. This level of customization makes it perfect for both casual racers and competitive drivers who demand a personalized RC experience.

Reliable KT-531P Transmitter and Balanced Motor Power

Included in the set is the KT-531P pistol-grip transmitter, a user-friendly and reliable controller that makes the Mini-Z feel like a full-sized race car. The 130-class MZ9PB motor delivers balanced power suitable for both beginners and experienced racers. With a wide array of available Mini-Z option parts, you can continue upgrading the performance as your skills progress.

Features:

Fourth-generation MR-04 chassis with W-MM configuration
KT-531P pistol-grip style transmitter included
Compatible with Auto Scale Collection and unpainted bodies
Lower center of gravity for improved cornering
Redesigned steering geometry for better control
130-class MZ9PB motor included
Perfect for customizing with MINI-Z option parts
Smooth rear-wheel-drive handling
Requires only AAA batteries to operate
Ideal for beginners and seasoned Mini-Z racers

Includes:

(1) MR-04 RWD Chassis (W-MM configuration)
(1) KT-531P Transmitter
(1) MZ9PB 130-Class Motor (Installed)
(1) Instruction Manual

Needed To Complete:

(4) AAA Batteries for Chassis
(4) AAA Batteries for Transmitter
(4) Wheels and Tires
(1) Compatible Mini-Z Body

Specifications:

Scale	Mini-Z
Drive	RWD
Power Source	Electric
Length	-
Wheelbase	4.02in (102mm)
Width	-
Height	-
Weight	Varies
Assembly Level	Kit*

*Tech Note: RC Kits are an unassembled Remote Control Model that require assembly, racer selected electronics, and other racer provided items. Photos of assembled kit are for illustrative purposes only. For a complete list of needed items to drive this kit please see the list above.

Kyosho MR-03/MR-04 Motor Set (RWD)

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