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Mugen Seiki MBX8R Eco 1/8 4WD Electric Buggy Kit
- $258.49
- Brands Mugen Seiki
- Product Code: MUGE2028
- Availability: In Stock
Mugen Seiki MBX8R ECO 1/8 4WD Electric Buggy KitProduct OverviewThe Mugen Seiki MBX8R ECO is a competition-focused 1/8-scale 4WD electric off-road buggy kit developed from the proven MBX8R platform. The E2028 kit combines race-oriented suspension geometry, High Traction Differentials, an updated lightweight chassis, and a flexible battery mounting system for modern 4S electric power setups.Designe..
High Performance 1/8 Scale 4WD Electric Buggy Kit
Mugen Seiki MBX8R ECO 1/8 4WD Electric Buggy Kit
Product Overview
The Mugen Seiki MBX8R ECO is a competition-focused 1/8-scale 4WD electric off-road buggy kit developed from the proven MBX8R platform. The E2028 kit combines race-oriented suspension geometry, High Traction Differentials, an updated lightweight chassis, and a flexible battery mounting system for modern 4S electric power setups.
Designed for demanding off-road tracks, the MBX8R ECO focuses on stability, rear traction, jump control, and a wide range of tuning options. It is a strong choice for experienced RC racers who want a serious competition buggy that can be adapted to different track conditions.
Key Features
1/8-scale 4WD electric racing buggy
Mugen Seiki E2028 kit
High Traction Differentials (HTD)
New suspension mounts and revised geometry
Narrow RF (C) and RR (D) pivot blocks
Adjustable pivot inserts for increased setup flexibility
Longer box-shaped suspension arms
Rear suspension arms made from impact-resistant material
Optional CFRP plates for adjusting lower-arm stiffness
CFRP plates on rear uprights for rear roll-center adjustment
New front shock tower and upper front arm mount
Lightweight chassis with additional machining
Beveled front chassis section for improved ground clearance
Two-piece battery tray for shorty and standard 4S batteries
Lightweight, high-downforce rear wing
Revised wing mount for improved durability and downforce
Emulsion shock caps included
Updated sway-bar collars
Lightweight center differential cover with lightening holes
Suspension and Geometry
The MBX8R ECO features revised suspension geometry designed to provide racers with a broader range of setup choices.
The new narrow C and D pivot blocks use interchangeable pivot inserts, allowing adjustments to suspension geometry. The longer box-shaped suspension arms improve rigidity, while the rear arms use an impact-resistant material for greater durability.
Optional CFRP plates can be installed to change the stiffness of the lower suspension arms. The rear uprights also feature CFRP plates that allow the rear roll center to be adjusted.
At the front, the redesigned shock tower and upper arm mount use new pivot inserts, giving racers additional control over front-end geometry.
Lightweight Chassis
The MBX8R ECO uses a revised chassis specifically adapted for the electric buggy configuration.
Additional machining provides increased droop adjustment, while the beveled front section improves ground clearance when driving over rough terrain. The revised design also reduces chassis weight.
This combination helps the buggy maintain predictable handling while giving racers more freedom to tune suspension movement and ride characteristics.
4S Battery System
The MBX8R ECO includes a two-piece battery tray that supports both shorty and standard-size 4S batteries.
Two battery straps are supplied:
380 mm strap for 4S short batteries
455 mm strap for 4S standard batteries
The battery holder accommodates packs up to approximately:
| Battery Dimension | Maximum |
|---|---|
| Width | 47.5 mm |
| Length | 140 mm |
| Height | 47.5 mm |
Battery dimensions should be checked before purchase because packs with different cases or connectors may have different physical clearances.
High Traction Differentials
The MBX8R ECO comes equipped with Mugen Seiki High Traction Differentials (HTD).
The HTD design is intended to improve acceleration, traction, stability, and consistency, particularly on bumpy or low-grip sections of a track. The differentials use updated 20T internal gears for smoother and more consistent operation.
The standard drivetrain configuration includes:
13T bevel gear
44T conical gears
46T molded spur gear
Standard Differential Oil Setup
| Differential | Oil |
|---|---|
| Front | #5,000 |
| Center | #5,000 |
| Rear | #2,000 |
These oil weights provide the manufacturer's standard setup and can be changed according to track conditions and driving style.
Shocks and Suspension Setup
The MBX8R ECO includes emulsion shock caps and a competition-oriented standard shock setup.
| Position | Shock Oil | Spring | Piston | Anti-Roll Bar |
|---|---|---|---|---|
| Front | #550 | Ø1.6 × L70 / 9.25T | Ø1.3 × 8H | Ø2.3 mm |
| Rear | #550 | Ø1.6 × L86 / 10.75T | Ø1.3 × 8H | Ø2.7 mm |
The supplied setup is intended as a starting point. Racers can change spring rates, oil viscosity, piston configuration, and anti-roll bars to match grip levels and track characteristics.
Aerodynamics
The MBX8R ECO uses a lightweight, high-downforce rear wing designed to improve stability both on the ground and during jumps.
The wing allows greater airflow through its design while maintaining the downforce needed for predictable handling. The revised wing mount improves durability and provides additional control over rear downforce.
A CFRP wing plate is available as an optional upgrade.
Product Specifications
| Specification | Details |
|---|---|
| Brand | Mugen Seiki |
| Model | MBX8R ECO |
| Part Number | E2028 |
| Vehicle Type | Electric Racing Buggy |
| Scale | 1/8 |
| Drivetrain | 4WD |
| Power System | Electric |
| Intended Use | Off-Road Racing |
| Battery System | 4S compatible |
| Differential | High Traction Differential |
| Internal Differential Gears | 20T |
| Bevel Gear | 13T |
| Conical Gear | 44T |
| Spur Gear | 46T molded |
| Front Diff Oil | #5,000 |
| Center Diff Oil | #5,000 |
| Rear Diff Oil | #2,000 |
| Front Shock Oil | #550 |
| Rear Shock Oil | #550 |
| Front Anti-Roll Bar | Ø2.3 mm |
| Rear Anti-Roll Bar | Ø2.7 mm |
| Front Shock Spring | Ø1.6 × L70 / 9.25T |
| Rear Shock Spring | Ø1.6 × L86 / 10.75T |
| Front Shock Piston | Ø1.3 × 8H |
| Rear Shock Piston | Ø1.3 × 8H |
| Battery Tray | Two-piece, shorty/standard 4S compatible |
| Battery Maximum Width | 47.5 mm |
| Battery Maximum Length | 140 mm |
| Battery Maximum Height | 47.5 mm |
| Kit Type | Assembly Kit |
What's Included
The MBX8R ECO kit includes the major components needed to build the electric buggy chassis, including:
MBX8R ECO chassis components
Revised suspension components
High Traction Differentials
13T bevel gear
44T conical gears
46T molded spur gear
Battery tray
Battery straps for short and standard battery configurations
Front and rear shock components
Shock springs
Shock pistons
#550 shock oil
Differential silicone oils
Front and rear anti-roll bars
Body
Rear wing
Steering servo horn
Front and rear tension rods
Emulsion shock caps
Aluminum wing button
Mugen Seiki notes that specifications and kit contents may be changed as part of product improvements.
Required Equipment
This is an assembly kit, not a ready-to-run vehicle. Additional equipment is required before the buggy can be operated.
You will need:
2-channel or greater RC radio system
Transmitter
Receiver
Steering servo
Electric motor
Electronic speed controller (ESC)
4S-compatible RC battery
Battery charger
Wheels
Off-road buggy tires
Body paint and painting supplies
Mugen Seiki does not include the motor, ESC, vehicle battery, charger, or radio equipment as part of the basic E2028 kit.
Recommended Applications
The MBX8R ECO is suitable for:
1/8 electric buggy racing
Off-road RC competition
Club racing
High-grip and low-grip tracks
Bumpy and uneven tracks
Jump-heavy off-road circuits
Experienced RC hobbyists
Racers who want extensive suspension and drivetrain tuning
Setup and Maintenance
The MBX8R ECO is designed as a competition platform, so regular maintenance is important for consistent performance.
Inspect the differentials, drive components, bearings, shocks, suspension arms, sway bars, fasteners, and drivetrain regularly. Battery mounting should also be checked carefully before each run.
Because the buggy has a wide setup range, racers can fine-tune the vehicle through:
Differential oil
Shock oil
Spring selection
Piston configuration
Anti-roll bars
Roll-center settings
Suspension geometry
Pivot inserts
Chassis setup
Battery position
Wing and aerodynamic setup
Mugen Seiki provides dedicated MBX8R ECO setup documentation for further tuning.
Important Product Notes
E2028 is the electric MBX8R ECO, not the nitro MBX8R E2027.
This product is an assembly kit, not a ready-to-run vehicle.
Motor, ESC, battery, charger, radio system, wheels, and tires are not included unless specifically stated by the seller.
The battery tray supports both short and standard 4S battery formats within the manufacturer's specified maximum dimensions.
Optional lightweight and stiffer front/rear lower arms are available separately.
Actual performance depends on motor and ESC selection, battery, tires, track surface, gearing, and setup.
Product specifications and included components may change without notice due to manufacturer improvements.
Summary
The Mugen Seiki MBX8R ECO E2028 is a serious 1/8-scale 4WD electric racing buggy kit built around the successful MBX8R platform.
Its High Traction Differentials, revised suspension geometry, lightweight chassis, adjustable rear roll center, flexible 4S battery mounting system, and high-downforce wing make it a highly tunable platform for demanding off-road racing.
For experienced RC racers looking for a competition-oriented electric buggy with extensive setup potential, the MBX8R ECO offers a strong combination of traction, stability, durability, and adjustability.
