Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit

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Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
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Price: $649.99

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"This kit is so smooth to build. Parts fit great while building, tons of hop ups, informative videos, and advice online, the stock setup honestly is really good. The only thing I would recommend straight away is the aluminum servo saver arm, a few spring and sway bar options. Then send it!" - Austin - Verified Owner

The Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit is designed to offer racers a cutting-edge advantage. With numerous enhancements over its predecessors, the MBX8R delivers improved stability, enhanced rear traction, superior jumping capabilities, and a broad tuning range. These updates provide racers with the necessary adjustments to tackle any track condition.

About The MBX8R


Suspension

The suspension system integrates updated "C" and "D" blocks with refined inserts for enhanced performance. Durable, impact-resistant material is employed to craft longer box-shaped arms, ensuring increased longevity. Notably, the rear uprights have been upgraded, utilizing carbon fiber-reinforced polymers (CFRP) to facilitate roll center adjustments. These enhancements contribute to a more tunable and advanced suspension system.

Chassis and Drivetrain

The chassis underwent an overhaul to align with the updated suspension geometry. Significantly, the drivetrain experienced substantial enhancements in the differential system. High Traction Differentials (HTD) are now employed to deliver heightened acceleration, extended runtimes, and more dependable handling. The differential upgrades include a larger volume differential cup, promoting consistency and facilitating precise timing through rhythm sections, thereby enhancing traction. Additionally, at the rear of the chassis, a lightweight, IFMAR-compliant, high downforce wing is incorporated to further refine jumping performance.

Clutch

The provided 4-shoe clutch is a sophisticated component that offers ease of maintenance and tuning. Crafted from aluminum, this 34mm clutch is equipped with adjustable spring tension, allowing precise customization of engagement to align with the racer's engine, track conditions, and individual preferences. The clutch is coupled with a 13T clutch bell to deliver optimal out-of-the-box performance.

Features

  • Narrow C and D blocks allow for precise squat and toe adjustments
  • Fully adjustable 34mm 4-shoe clutch with 13T clutch bell
  • Includes HTD differentials for increased acceleration, longer runtimes, and consistent handling
  • S bent air filter boot and high-volume filter housing
  • Brake override and caliper springs for smoother more consistent braking
  • 90-degree fuel tank fitting for cleaner fuel line routing
  • Sway bar collars to reduce sway bar movement
  • Emulsion shock caps are included in the MBX8R kit

Includes:

  • (1) Mugen Seiki MBX8R Nitro Buggy Kit
  • Manual

Needed to Complete

  • .21 engine and pipe
  • 2 or 3-channel radio/transmitter set with power switch - FM/PCM/2.4GHz recommended
  • 4.8-7.4v receiver battery
  • Flat style NiMH, OR Flat style LiPo receiver battery 
  • Model car fuel (20-30% nitro recommended)
  • Nitro starter accessories
  • 1:8 scale buggy tires & wheels
  • CA (cyanoacrylate) glue
  • Polycarbonate-specific paint
  • Thread-locking compound
  • Steering servo
  • Throttle servo

Specifications:

Scale Size 1:8
Terrain Off-Road
Body Style Buggy
Drive 4WD
Length -
Width 12.1in (309mm)
Wheelbase -
Weight Varies
Power Source Nitro
Assembly Level Kit*

*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.

Manuals:

User Manual

Parts Diagram

Parts List

Setup Sheet:

Kit Setup

Blank Setup

This product was added to our catalog on January 28, 2022

B.C.
Verified Owner
Tuesday, Apr 12 2022 (about 2 years ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
This kit went together perfectly! No tricks. No hiccups. Beautiful build from A to Z. No complaints. Great job Mugen!
Trever Lund
Wednesday, Mar 23 2022 (about 2 years ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
Great build. Went together flawless. Screws arent a issue lol. Use good tools and mabe a tad bit of grease on the threads. Love the car and cant wait for race season!
Chelsey Rains
Saturday, Sep 3 2022 (about 2 years ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
The buggy is extremely durable ,smooth, and easy to drive.
I recently switched from Tekno cars to mugen and am super happy I did the buggies are really stiff when new but after fully breaking in they get better & better every drive!!! Highly recommend these cars
Austin Schaeffer
Verified Owner
Sunday, Nov 5 2023 (12 months ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
This kit is so smooth to build. Parts fit great while building, tons of hop ups, informative videos and advice online, the stock setup honestly is really good. The only thing I would recommend straight away is the aluminum servo saver arm, a few spring and sway bar options. Then send it!
Norris Chuck
Verified Owner
Saturday, Jun 17 2023 (about a year ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
High quality kit. I have built many kits and the quality, fit, and finish on this one is the best I have seen. I am very impressed.
Jonathan Mejia
Verified Owner
Thursday, Nov 24 2022 (about a year ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
Fantastic toy and excellent shipping method and service that provides Amain hobbies .. I will definitely continue purchasing here now that I know that I can always find the best quality items ..
kin wong
Sunday, Apr 17 2022 (about 2 years ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
have not return buy mugen since mbx7t and mrx5. one pillow ball have no hex tread (got replace/ mail in return part )and 12/42 diff and input gears have too much play (1mm play measure from the drive cup), verified from local factory driver but still no luck to get a good replacement. bought another new in package gears for mbx8 gears 13/44 have very good mesh ( 1/10mm play) . have another new mbx8r at the track and got same lose gear mesh. so i guess the quality control not that good.
Victor Alcocer
Verified Owner
Sunday, Jul 17 2022 (about 2 years ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
I replaced my MBX7R after 6-7 years. After finish building the kit and had raced it for the second time, I don't see the MBX8R worth $850.

• Manual and literature
o Poor English, spelling errors and poor instructions everywhere (for $850)
o Instructions are hard to follow. There are no arrows indicating what is front/rear, what is up/down, or in which direction are the detailed views supposed to be seen, etc. There are parts in the kit missing instructions how to install them.
o Missing instructions and optional part needed to turn the CVDs into universals.
o The manual look is outdated when compared to Tekno or Xray, even the Sworkz that is black and white looks better.
• The amount of B0330Z super joint grease in the kit is a joke. With a tag price of $850 I would have expected at least the amount of grease needed to complete the kit and some more to service it a couple of times.
• One piece wing mount design suck. At least the 3 hex pockets that are apparently intended to prevent the hex nuts from spinning. In the MBX8R complete build video from Adam Drake you can clearly see he uses some pliers to prevent the nuts from spinning.
• Front suspension pillow ball got loose just after the first 13min race. This is not supposed to be a serviceable part, you are not supposed to check if it is tighten or not, and there is no way to tighten it. This is a serious quality concern. Beware you may get your $850 kit destroyed in the first race.
• The center differential top plastic piece hits the fuel tank. With the MBX7R I got 4 tanks broken leaking until I Dremeled the edge of that plastic piece off.
• Weak servo supports (small footprint), it flexes a lot when you apply the breaks. Had the same issue with the MBX7R.
• CVDs are included with the kit. However seems like universals (not included) are preferred.
• One-piece center differential supports. Sworkz, Tekno and Xray already have the two-piece plastic support for ease of center diff service. With the MBX8R you need to remove all, and part of the electronics or the fuel tank or one of the diff boxes to be able to service the center diff.
• No air filter support to the fuel tank. It rubs against the brake linkages. I wouldn’t be surprised if it falls off after some big jumps.
• No room for two 18650 batteries whereas Sworkz battery tray has enough room for them. Not a big deal, I had modified the battery tray myself to make the batteries fit. I cut a big hole on the side and on the top cover.
• Still the same small weird shaped radio box. I have an old Hitec Lynx radio/receiver, it’s always been a pain to fit the switch, receiver, transponder and manage the cables inside the small box. I can’t tell why it has that weird shape, would be great if it is made bigger and square, there is enough room at the back of the chassis.
• Front brakes get stuck from time to time. Seems like a design issue. The linkages do not lay parallel to each other. The distance between the linkages at the servo horn vs the distance between the centers of the levers do not match, which causes the front linkage cone bushing to get stuck with the lever, braking the front axle at neutral position.
• PLASTIC steering servo horn E2803A, PLASTIC servo saver arm E2301A and PLASTIC front upper plate E2148. $850 for what?
• The front bumper design doesn't protect the front of the aluminum chassis from chipping when entering the ramps. An integrated skid plate like the Sworkz one would be great.
• Some part numbers like the shock ends E0545, and the differential box E2142 are now discontinued just after few months that the MBX8R was released...

I'm quite disappointed...
The Scar
Friday, Mar 25 2022 (about 2 years ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
Great build, totally satisfied with this kit. If you are buying this kit chances you are not a beginner, make sure you are using quality tools, cheap tools will strip your hardware. On the track the car is a big improvement over the Worlds Edition, you will need to trim 3mm of the rear shock rod end to achieve the proper rear ride height. Other than that out the box the car is a beast, the flashpoint engine works great for me perfect power balance.
German Martinelli Guerra
Tuesday, Jan 25 2022 (about 2 years ago)
Mugen Seiki MBX8R 1/8 Off-Road Competition Nitro Buggy Kit
TKM Mugen Seiki XOXOXOXOXOOXOXOXOXOXOXOXOXOXOXOXOXOXOXOXo