MR-04
Indoor RCP racing, GT-style builds
Kyosho's narrow-chassis RWD platform built for GT-style bodies. More nimble than the MR-03, with a tighter track width and narrower footprint.
The MR-04 EVO is Kyosho's answer to narrow GT body shells that don't proportion well on the wider MR-03 chassis. The narrower track and lower ride height give it a more scale-accurate stance, and the shorter wheelbase options make it well-suited to sports car bodies. The core upgrade philosophy is the same as the MR-03 — bearings first, then T-plate, then motor — but parts are not fully interchangeable between the two platforms. Confirm compatibility before ordering.
Guides for the MR-04 33 guides
How to Buy Your First Mini-Z: ReadySet, Sports, or Chassis Set?
Mini-Z ReadySet, Sports, or bare chassis set? How to pick your first car and the cells, charger, and transmitter you actually need to run it.
Mini-Z Bearing Maintenance: Clean, Re-Oil, and Know When They're Done
Dirty bearings quietly steal lap time. How to spin-test, clean, and re-oil Mini-Z bearings, and how to know when one is too far gone to save.
Mini-Z Brushed Motor Guide: Turn Counts and What to Buy
What Mini-Z brushed motor turn counts actually mean, the RPM-vs-torque-vs-heat trade-off, and how to pick the right motor for your track and class.
Mini-Z Spring Rate Reference Chart: Front and Rear by Chassis and Surface
Mini-Z spring rate quick reference for MR-03, MR-04, and MA-020. Front and rear spring recommendations by chassis and surface with a diagnosis guide for common handling problems.
Mini-Z Sway Bar Setup: Roll Stiffness and When to Add One
Sway bars are the suspension variable most Mini-Z drivers add too late. How they affect body roll, when to use them, and what to buy for MR-03 and MA-020.
Mini-Z Setup Sheet by Surface: Carpet, Asphalt, RCP, and Drift
Surface-specific Mini-Z setup baselines in chart format. Tire compound, spring rate, differential oil, and gyro settings for carpet, RCP foam, asphalt, and drift.
How to Read a Mini-Z Setup Sheet (And Build Your Own)
Every field on a Mini-Z setup sheet explained -- toe, caster, camber, droop, diff preload, T-plate, and gear ratio. Understand what you're actually adjusting.
Mini-Z Pinion Gear Ratios: 6T-11T by Chassis
Gear ratio table for Mini-Z pinion sizes 6T through 11T across MR-03, MR-04, MA-020, and MX-01 chassis, with motor type context and surface recommendations.
Mini-Z Spring Rate Tuning: Read Your Car
Diagnose understeer, oversteer, and chassis balance by what you feel on the track, then pick the right Mini-Z spring change to fix it.
MR-04 Setup Guide: Kyosho's Narrow Platform
The MR-04 EVO2 runs different from the MR-03. Here's how to dial in springs, T-plate, tires, and gyro for the narrower chassis.
Mini-Z FET Mod: MOSFET Replacement and Stacking
What a FET mod actually is, which Mini-Z platforms need it, how to do it safely, and when it's worth doing at all. The complete reference for club racers.
Mini-Z Suspension Setup: Spring Rate, Droop, and Camber Explained
How to set Mini-Z spring rate, droop, and camber for RCP, carpet, and AWD. Read the chassis and dial in a neutral, planted setup instead of fighting it.
Mini-Z Bearing Upgrades: Ceramic vs Steel
Not all Mini-Z bearings are worth upgrading. Here's which positions actually change handling, ceramic vs steel trade-offs, and what to buy at every budget.
Mini-Z Racing vs Bashing: Setup Guide
Racing and bashing demand different setups. Here's how to configure your Mini-Z for competitive laps or backyard fun.
RCP Track Setup: Layout, Surface, and Gear
Home RCP layout: 24-60 tiles. Club-size: 70-120. Covers tile counts, layout design, barriers, EasyLap timing setup, and surface prep for Mini-Z racing.
Mini-Z Battery Guide: NiMH vs LiPo
Consistent voltage means consistent lap times. The full breakdown on NiMH vs LiPo for Mini-Z, which cells to buy, and how to charge them correctly.
Mini-Z Body Compatibility: MR-03, MR-04, MA-020
Don't buy a body that won't fit. Wheelbase, offset, and width specs for MR-03, MR-04, MA-020, and MX-01, with the fitment rules that trip up new buyers.
Best Mini-Z Transmitters in 2026: Ranked
Best Mini-Z transmitter upgrades ranked: EX-6R, KT-432PT, EX-1 KIY compared by features, price, and real track performance. Which radio is worth your money?
Best Mini-Z Upgrades Under $50: Every Platform
Compare the best $50 Mini-Z upgrade path across MR-03, MR-04, MA-020, MX-01. Ranked by impact with prices and platform-specific notes.
Best First Mini-Z Upgrades: 5 Mods That Matter
New Mini-Z owner? Start with these 5 upgrades—ranked by impact per dollar. The first mod transforms how your car drives for under $15.
Mini-Z Tire Guide: Which Compound for Your Track Surface
Mini-Z tire compound guide by surface: RCP, carpet, tile, and concrete. Stop guessing—match the right tire to your track and fix push/snap handling instantly.
Mini-Z Maintenance Schedule
A session-by-session Mini-Z maintenance schedule. What to check after every run, every 5 sessions, and every 20, so nothing fails on race day.
Mini-Z Race Day Checklist: What to Bring
Everything you need in your pit bag for a Mini-Z race night. Batteries, tools, spares, and the pre-race routine that keeps you off the DNS list.
Mini-Z Wheel Offset and Width: What Fits
Wheel offset and width explained for every Mini-Z platform. What the numbers mean, what fits without rubbing, and how offset affects handling.
Mini-Z ESC Tuning: Punch, Brake, Drag Brake
What ESC tuning parameters actually do on track: punch control, brake strength, and drag brake settings explained practically for Mini-Z RWD and AWD.
The Mini-Z Tools Guide: What You Actually Need
Most Mini-Z owners have the wrong tools or are missing one critical size. Here's exactly what to buy, in what order, and what you can skip.
Best Mini-Z Tires for RCP Tracks (2026)
The definitive tire compounds to buy for high-grip RCP foam tracks. Stop guessing and start turning laps.
Mini-Z MR-03 vs MR-04: Which Chassis to Buy in 2026
MR-03 costs less with deeper parts availability. MR-04 has lower CG and newer electronics. Which chassis wins for your budget and track style in 2026.
Mini-Z Tire Compounds by Surface
A practical tire compound system for Mini-Z racers. Baselines for RCP, carpet, and hard surfaces with symptom-based adjustments that actually work.
MR-04 Upgrade Guide: Kyosho Mini-Z Narrow GT
MR-04 upgrade path from stock to competitive: what's different from the MR-03, what parts don't cross over, and what to buy first.
How to Set Up a Gyro on Mini-Z MR-03 and MR-04
Step-by-step gyro install for the DasMikro and MZW405. How to set direction, dial in gain, and eliminate snap oversteer on carpet, RCP, and tile.
Mini-Z Brushless Conversion: Motor, ESC & LiPo
Step-by-step brushless conversion for Mini-Z MR-03 and MA-020. Motor KV selection, ESC compatibility, LiPo wiring, and what actually changes on the track.
Mini-Z T-Plate Setup Guide: Flex Ratings, Materials, and When to Change
Carbon over plastic, medium flex to start, and one specific symptom that tells you to go stiffer. The complete T-plate decision guide for MR-03 and MR-04.