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Mugen MBX7R

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Old 10-27-2014, 12:22 PM
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Originally Posted by bkuff-losi View Post
Did you use the box set up ?
Yes i used box set up , then changed the rear hubs to lowest position and ran 28r -26f ride height . 7-7-5 in the diffs and stock oil . car had more rear grip than the 7 . IMHO alot more grip steering was better too both on and off power
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Old 10-27-2014, 01:32 PM
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Just picked my MBX7r up . Ive just built the front end and its all gone together like clockwork. Mugen really put together an amazing bit of kit. Cant wait to finish the build and get racing .
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Old 10-28-2014, 09:20 AM
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Hey guys how about some build pics. Or tips on your build of the buggy I will be building one in a couple days when it gets here
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Old 10-28-2014, 09:47 AM
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I just got my kit today. hope to get started on it soon
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Old 10-28-2014, 12:04 PM
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Originally Posted by mp9racer View Post
Hey guys how about some build pics. Or tips on your build of the buggy I will be building one in a couple days when it gets here
I just followed the directions . Best kit ive built so far ,very straight forward and simple. I did loctite a few more places than the manual suggested . Like everytime a screw goes thru a nut or metal object . I even loctite nylon tipped nuts because ive actually had them back off.
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Old 10-28-2014, 12:13 PM
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Originally Posted by fgnewbie View Post
Yes i used box set up , then changed the rear hubs to lowest position and ran 28r -26f ride height . 7-7-5 in the diffs and stock oil . car had more rear grip than the 7 . IMHO alot more grip steering was better too both on and off power
what brand oil did you use in the diffs? Jw!I was told that different brand oils have different consistancy.
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Old 10-28-2014, 12:49 PM
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Originally Posted by allen71457 View Post
what brand oil did you use in the diffs? Jw!I was told that different brand oils have different consistancy.
Mugen oils supplied in the kit .
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Old 10-28-2014, 02:21 PM
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Every time I build the diffs on a new buggy I always forget the outdrives on the centre diff are different from the ones on the front and rear. Ive done it again on this build lol , so I hope this stops some one else making the same mistake as me .
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Old 10-28-2014, 04:59 PM
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when you guys built the diffs, did you use the small washers behind the spider gears? I never did when I had my mbx6 cars, but I am curious on this car.
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Old 10-28-2014, 09:45 PM
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I can't see that the diffs would work without those shims?
If you leave them out, the spider gears would sit directly onto the wall of the diff case and spin. Now all the "spinning action" takes place between the shim and the spider gear. The plastic would get ruined pretty quick I guess if the shims aren't in place.

The small o-rings however aren't even included in the kits any longer. (At least they weren't in any of my kits.)
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Old 10-29-2014, 12:35 AM
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Also necessary to "run in" the 7R like the 7 ?

I had to run in the X-7 to do a good setup. Before run it the car has a bad behavior to all setup changes.
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Old 10-29-2014, 07:32 AM
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Default Engine Help

Hello guys! I'm new to nitro just wondering what would be the best engine for this buggy? What am I looking for when choosing one? I like the novarossi brand, to be specific the Keep off .21-4, but what about the plus .21-4btt Wc/a? Which is better? Am I on the right track? Also which throttle servo is good and what do I look for as far as torque and speed? Lastly, what battery is needed? Sorry for all the questions, but this will bey first nitro buggy. Thanks in advance.
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Old 10-29-2014, 08:06 AM
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save yourself any hassle and get an os motor like a xz-b. nova rossi engines are good but they take forever to break in and dont tune as easy as an os engine. go for high torque servos on steering and throttle. having a super fast servo on the throttle can lead to tuning headaches, the carb opening to quick...you need torque for the brakes, a lot of torque.
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Old 10-29-2014, 11:01 AM
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Interestingly, I have heard quite the same story from Novarossi owners. (That O.S engines take forever to break-in)
I ended up purchasing an O.S XZ-B Spec II for mine since I got a great deal.

As for servos, I guess it is a little late for me as I just installed Savox 1270TG and 1273TG, thinking that the fast+torquey servo would be ideal for throttle/brakes.

This is my first nitro, so we'll see how it goes. Any tips on breaking-in this puppy or should I use Mr. King's method? (Heat cycle)

Last edited by LowBoost; 10-29-2014 at 12:33 PM.
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Old 10-29-2014, 12:01 PM
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Get the Nova Rossi and enjoy. Never had a issue with one in 17+ years. People make it sound like the Nova stuff is hard to tune when it is really simple and may need just a little here and there.
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