Mugen Seiki MBX7R 1/8 Off-Road Competition Buggy Kit

Mugen Seiki
MUGE2015
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This is the Mugen MBX7R 1/8 Off-Road Competition Buggy Kit. The MBX7R kit is based off the World Champion MBX7 platform with many high end improvements in suspension, steering and other areas to create the ultimate 1/8 nitro off road buggy. Mugen concentrated on making the suspension on the MBX7R even better with redesigned 16mm front and rear shocks. These shocks will greatly improve stability in the bumps and jumps, while helping to reduce fade during longer runs. The rear shocks are 4mm shorter and with the use of a redesigned rear shock tower, the back of the 7R will stay hooked up and on the ground. The 7R gets a chassis update, with a redesigned side angle that creates more strength and a better feel on all surfaces.

The MBX7R also benefits from a redesigned front hub carrier that changes the position of the front axle to a trailing axle position. This will improve overall steering and the driving feel of the 7R. A redesigned steering ackerman plate with additional steering tie rod holes is included to deliver maximum steering adjustability. The front upper suspension arm has been shortened 1.6mm to allow for more camber adjustability and the use of the E0161 spacer between the pillar ball and upper arm.

The drive train of the MBX7R has also been improved with the use of a universal style drive shaft for both the front and rear drive shafts. This will greatly improve the feel of the buggy on bumpy surfaces. The use of the universal will make the overall drive train much smoother and will spin with less friction. The redesigned wing mount moves the wing closer to the shock tower for better traction and jumping abilities, and the fuel tank gets a redesigned baffle system to increase fuel pick up and to keep the fuel clunk positioned correctly.

MBX7R Features:

  • Lightweight 46T spur gear
  • Lightweight conical gears
  • Straight cut conical and ring differential gears
  • Specially designed front upper and lower suspension arms, front hub carriers, rear suspension arms and hub carriers
  • Fully adjustable steering with new geometry, servo saver and ackerman plate
  • Front/Rear 16mm hard anodized threaded shocks with 3.5mm shock shafts and slim rubber boots
  • 5mm A7075 aluminum front shock tower
  • 4mm A7075 aluminum rear shock tower
  • 5mm A7075 aluminum lower suspension mounts for optimized geometry
  • A special designed fuel tank with redesigned baffle system
  • E0710 heavy duty aluminum clutch shoes
  • Stylish cab forward body
  • Re-designed wing mount and high force wing

Redesigned MBX7R Parts:
  • E2129 Front Upright: Redesigned front hub carrier incorporates the front universal to be in a trailing axle position. A redesigned universal (E2218) is used with this hub and it uses an 8mm x 16mm ball bearing.
  • E2131 Rear Upright: The rear hub carrier has been modified to allow for use of an 8mm x 16mm ball bearing which is required for the E2219 universal shaft. This hub carrier will also allow the use of the 15mm x 21mm ball bearing too. This hub carrier is compatible with the MBX7R and MBX7.
  • E2132 Front Upper Arm: The front upper suspension arm has been shortened 1.6mm in length. This will allow the use of the E0161 spacer between the pillar ball and the upper arm. This will allow for the same camber on each side of the buggy.
  • E2133 Rear Lower Arm: The suspension arm has been modified to allow for clearance so the E2219 universal doesn’t rub the arm. This arm is compatible with the MBX7R and MBX7.
  • E2218 Front Universal Shaft: A redesigned universal drive shaft set for the front of the MBX7R. The E2129 front upright must be used with these universals as they require an 8mm x 16mm ball bearing. The length of the drive shaft is 91.5mm.
  • E2219 Rear Universal Shaft: A redesigned universal drive shaft set for the rear of the MBX7R. The E2131 upright must be used with these universals as they require an 8mm x 16mm ball bearing. The length of the drive shaft is 89.5mm.
  • E2314 Steering Plate: The redesigned steering ackerman plate has 5 adjustment holes for maximum steering adjustability
  • E2408 Wing Stay: A redesigned wing mount can move the wing forward maximum 10.5mm to improve traction and overall feel of the buggy.
  • E2409 Stone Guard: The sides of the stone guard are changed to fit the 7R chassis
  • E2410 Chassis: The side angle of the chassis has been changed to increase chassis strength. This will allow for a better feeling on all surfaces.
  • E2528 & E2529 16mm Shock Set: Redesigned 16mm Front/Rear shocks which will greatly improve stability in bumps and jumps
  • E2818 Fuel Tank: The internal fuel baffles have been installed to increase fuel pick up and keep the fuel clunk position correctly.

Needed to Complete:

  • Big Block Nitro Engine
  • Tuned Exhaust System
  • 2 Channel Radio System
  • High Torque Steering & Brake Servo's (2)
  • Receiver Battery
  • Glow Driver
  • Starter Box & Batteries
  • Nitro Fuel & Fuel Bottle
  • Paint for Polycarbonate Body
  • Tires, Wheels & Glue
  • Charger for Receiver Pack & Starter Box Batteries

This product was added to our catalog on October 20, 2014.

AJ
Monday, Sep 28 2015 (9 months ago)
Mugen Seiki MBX7R 1/8 Off-Road Competition Buggy Kit
I've been racing for 12 years or so, I switched from Kyosho to Mugen and it was a easy build. The instructions were easy and simple, drivetrain is ok but not Kyosho smooth like I'm used too. But after it broke in it was a lot better. I've been racing the MBX7R Nitro and Eco for the past 8 months or so almost every weekend and the car isn't bad, handles good, has good forward bite but wished more rear traction! All in all good car, I've taken the car to a few national event and placed well and super easy to drive! I'd recommend to a beginner in racing 100%! But a must have is the aluminum rear hubs!
Joe Adragna
Verified Owner
Wednesday, Dec 17 2014 (about a year ago)
Mugen Seiki MBX7R 1/8 Off-Road Competition Buggy Kit
Really happy with the car, the buggy needs 1 gallon of fuel to get broken in, and it's damn good after that. The instructions could be better, but it gives you a general idea of what's needed. The car is built STOUT, and the pillow ball setup is terrific to work with. Check out the M2C battery mount, it's a very nice addition.
John Linner
Verified Owner
Tuesday, Jul 14 2015 (about a year ago)
Mugen Seiki MBX7R 1/8 Off-Road Competition Buggy Kit
Its a Mugen, you cant beat it. Very durable and easy to drive.
mark sipes
Verified Owner
Sunday, Dec 7 2014 (about a year ago)
Mugen Seiki MBX7R 1/8 Off-Road Competition Buggy Kit
Im very impressed with this kit, the build went smooth as expected and the plastics are of high quality. On the track you need to get around a quart of fuel through it to get it broke-in. After that its on rails.
Aaron Weigand
Thursday, Nov 6 2014 (about a year ago)
Mugen Seiki MBX7R 1/8 Off-Road Competition Buggy Kit
I've had the buggy for exactly 1 week now and am pretty happy with it. The fit and finish is decent (nothing spectacular) but the manual is must be a joke as it's just an exploded parts diagram. The kit setup was pretty loose but I'm starting to get it dialed in (still about 1 second off the pace of my Tekno). The body comes pre-cut and looks decent (especially compared to the stock Tekno body). It steers well and has predictable flight characteristics. Not a big fan of the shock design as it's a bit tough to really tighten the cap on the body since it has threads all the way up. The kit shock boots are worthless, dont even bother installing and use something like the 8ight 3.0 units instead (they last much longer). The kit air filter doesnt reach the secondary mount on the splash guard with a Picco engine but I swapped over to a Losi anyways so it didnt really matter. The brakes feel pretty good out of the box. Check the clunk when you're building the kit! Whoever built mine must have run out of fuel line as it was about 1/2" short so the nipple of the actual clunk was getting stuck between the internal baffles in the tank (narrow passage there). I removed the tanks nipple and reamed it out enough to just run a solid, single piece of line from the nipple all the way to the carb.