Mugen MBX-4, XR, RR Forum v2.0

[Micha_MX4]

Originally posted by Micha_MX4
The weight of my XR-Works is 1596g, Car with engine,
electronics, wheels (worn) but without fuel.

What about the MBX-5 and the rest of the pack???

Mike

Of course the weight ist 3596g, engine is a CMB LSi with
CMB flat slide carburator and Mielke Masterfix exhaust pipe,
2 Futaba 9450 Servos, Sanwa RX-211 receiver and a
Prafa fail safe

Mike

[Micha_MX4]

btw I change the air filter to a Jamara filter (like the K&N filters)...

[FlyinRazorback]

Hmmmmm........:rolleyes:

[Micha_MX4]

I forgot to mention the receiver pack - 5 cells Sanyo Twicells 1850

[kanairacer]

that CMB is pretty old, that must the the EVO1. the evo2's that came out last year put just about anything to shame. my friend's ws7 in his XR doesn't stand a chance, neither does my JP.

[Micha_MX4]

my engine is a longstroke CMB Rallye LSi DD - the same
generation as the short stroke Evo2's

check out t w f 8 (http://www.twf8.ws/new/tech/engine/cmbeng.html) for details

but don't know about these raptors I saw at the US distributors
site - tuned stock CMB's???

;-)

Mike

[Toiffel]

Hope you guys can help me out....
I have a MBX RR and I changed the pipe, I have a RB 9863 and the polished manifold same brand, but when I tried to install them they don't fit, it's like the pipe is too long and so is the manifold?? I compared them to my other pipe and manifold and they're longer, is there a special way to install them??
Any help appreciated!!!

[Micha_MX4]

Hi,

well I was using a steel wire to fix my Mielke Masterfix tuned
pipe in my xr, 'coz it was obviously shorter than the one
Mugen had in mind.

With the screw in the tip of the pipe you fix the wire.

Or do I get you wrong?

It's possible that you may have to shorten the pipe and the manifold according to your engine but maybe the R&B
support can help ayou with the ideal length of the exhaust
system.

Mike

[Toiffel]

I cut the manifold, and everything is ok, thanks

[DLF]

I'm sure this has been asked before, but I'll ask again. Anyone know of a new XR for sale for a good price? I have a friend who want's to get another 1/8th scale and I suggested maybe finding an XR for a good price (exhuasting old stock). Nitro house says out of stock as well as a few others.

[s14det]

I have seen a couple on ebay. New and used. I just bought one for $260 with hop-ups about a week ago.

[Rog]

DLF - sent you an email about my buggy for sale.

[speedydave]

I should have my XR up for sale in a few weeks. I need to rebuild it and get all the parts looking all new and everything. Got an X5 on the way. :)

[DLF]

Umm, NEW guys...NEW. That's what he wanted. However, I think he's already decided on something else anyway. Thanks though.

[speedydave]

I know, I know. Just wanted to see if maybe anyone wanted a parts car or something. :)

[MBX4RR]

Will the XR universals work in a 4RR.:confused:

[speedydave]

Anyone converted their XR into a Hybrid MT? I'm thinking about converting mine to race Unlimited MT's since my X5 will be here any day, but I'm not sure how well it will work. Anyone?

[crypt]

well, some wheels/tires from the ofna monster pirate or big joe (i say those two because are the biggest in the market) could fit, also you must add a 11- 12 teeth clucht bell, to increase torque, and add some taller body posts to fit any truck body, remove the stone guards from the buggy, but i think thats all, well no, i supose that you will have some hi torque servo, at least 13kg i think this will work well. i´m thinking about your project with my mbx xr, but that will be at least in the next xmas, when i buy another buggy

[HDClown]

I'm going to do it, what crypt said is mainly what it entails. You can also put a set of long shocks on the front as well. Need to use rear shock tower, but it works from what someone on here told me, if i recall correctly.

I just got a house, so after I move in and settle in I'll get an X5 and convert my XR. Or if I can sell my Savage I'll do it.

[dgrobe2112]

Allright.. guys, i just picked up a mugen MBX4 buggy.. i have been wanting to get into 1/8 scale racing.. now.. i got it used from a buddy.. and it is clean... now i didnt want to pay 600 for a new one.. are these mugen buggies compeative with ofna and other brands.. are there any pros and cons to this buggy compared to others?? I drove it at the track today.. and it is great.. it handles good.. and i think i will like this racing..

thanks
daniel

[DLF]

Where is everyone? I know the MBX5 is out, but I also know the XR/RR buggys are still competative. I intend to keep racing mine for at least the next several months. :D

[Racin Rev]

I am wondering about parts support on the mbx-4 series buggies. Is anyone having trouble getting stuff?

DLF, I don't know where everyone is but I know that periodically I drop off of the notification list. Then it takes a while to notice: "hey! I haven't gotten anything from radio control zone lately."

[Toiffel]

I've been getting my stuff at ace hobby, my lhs seems to have a hard time trying to get the parts for me, until now ace has done a good job, hope it continues....

[speedydave]

My LHS still carries parts, but I don't know if they plan on re-stocking when they run out, or if they will just re-stock with MBX5 parts.

[Micha_MX4]

Hi there,

made anyone experiences with Torsen
Diff's in his XR ?


Micha

[kc_nitro_rc]

Does anyone know if the motor mounts from other 1/8th scale cars can be used in an MBX4?

[TheRo0sTer]

Sup guys after many years of staying out of 1/8th I jumped back in with Mugen! Last time I owned a Mugen it was a Super Athlete. TexRacer assures me that the MBX4 is far superior to those old dinosours. Here is what I bought on eBay last night!

Mugen MBX4 XR Works
OS MAX-21 RZ-V01B NIB -NOV52058HC,
-053 Hard Coat, 1/8 Off-Road One-Piece Pipe with power adapter
-All standard parts
-Custom Chassis
-Front, Center, Rear Fioroni Torsion Diff
-Venom On-Board Temp Gauge
-MIP CVDs center, front, rear
-Stainless Steel Screws
-Titanium king pins
-Custom shocks with 40-weight oil
-Set of Hard Med and Soft springs
-Aluminum arm mount (bottom)
-Aluminum front and rear shock posts
-Aluminum rear brace
-Aluminum Servo Tray (Carbon fiber in on the buggy but I will include this Alum. One)
-Aluminum Servo Tray Mounts
-Aluminum ERGAL LOWER SUSPENTION ARMS
-Carbon Fiber Servo Tray -Carbon Fiber Side Guards -Blue Star Bearings (The ones with the blue seal, the best, made out of aircraft aluminum and Teflon sealed titanium BBs)
-K&N Open Air Filter -Polished aluminum wheel hubs
-OFNA 1/8 off-road starter box dual motor with 12v battery

Now my question is where do I find those Fioroni shock towers? Or do the ones for the Kanai fit the MBX? Also do any of the MBX5 parts cross over? What about the Chassis stiffners why are they mounted to the top of the center diff? Can they be machined to fit like they do on the Kyoshos and MBX5? Any help is greatly appreciated!

http://i1.ebayimg.com/03/i/00/cf/4c/66_1.JPG

[TheRo0sTer]

What else has been changed on the MBX5 from the MBX4? I'm sure someone here has owned them both.

[DLF]

Guys, I posted this in the MBX-5 thread so I figured I'd post it here too.

The problem I'm having is the dogbone end of the CVD's. I find that the pins going thru the sphere of the CVD (at the diff end) tends to slide out after a period of time. The most recent time, a front one slid out and starting striking the diff housing.

Have any of you guys seen this and if so, did you find a way to fix it?

Thanks.
Dana

[speedydave]

Rooster-I own both buggies, though my XR is sitting on the shelf waiting to either be sold or waiting for me to find the $$ to order the JT Racing conversion kit for it. I copy/pasted this from a post of mine in the MBX5 thread:

There are quite a few differences you can notice just by looking at the two side by side. Most noticable is the laydown steering servo(I'm surprised it took this long for someone to do this...), which lowers the car's CG. Also, a big difference is where the arms mount. On the MBX4, the arms were mounted to the chassis directly, but on the MBX5, the arms are mounted with mounts attached directly to the diff cases(like the Kyosho MP7.5), not to the chassis. This allows the arms to be longer while still maintaining legal width, which creates a more stable buggy. Also, another difference, which won't change performance(much), but does make things easier on the owner is the new radio box and personal transponder mount. The radio box now has the receiver pack closest to the center of the chassis, which does a couple things: moves more weight to the center of the buggy, which makes it easier for the buggy to transition in corners and moves the receiver farther from the engine to reduce glitching. The new radio box is also easier to get into, instead of removing two screws to get to the receiver, you simply remove a body clip, and the cover pops off, exposing the receiver. There are a bunch of other differences, most of which just lower CG: the chassis has slots machined in to let the diffs sit lower in the chassis and there is another part machined away in front of the flywheel hole to allow clutchbell clearance so the engine can be mounted lower. There's also some trick carbon fiber stuff, aluminum clutch shoes, and Big Bore shocks are included, instead of being a $130-140 option.

Hope that helps.

[primuswoostinkinhoo]

anyone know a website that has a parts list for the mbx4rr, or does anyone know the part number for the 4 gears inside the diff? i need to order it, but i need a part number

[auto2]

http://www.mugenracing.com/enter.html?target=Off_RoadMBXzn4_RRzpXR.html

can't go wrong there.
Also try nitro house which will be cheaper.

So anyone with comments on the JT racing monster truck conversion?

here is the deal . I have 2 mugens now and have never raced before.

think I'll have an easier time in the MT class as opposed to the 1/8 buggy class?

[TheRo0sTer]

Thanks Speed Dave! I was loking into selvaging the most the parts from my X4 and start converting it to and X5. Using Mostly the Torsen Diffs and bearings. It can be achieved if you are patient on eBay.:D

[wild gopher]

I just purchased a Mugen MBX-4 XR that came with an RB C4 engine in it. I have to say that it is a very fast engine, unfortunately, the local track I go to is kinda small and I need some low end. So my question is, which one piece pipe will get me more low end?
Also, once this engine dies (and who knows when since i got it used), i plan to swap engines rather than doing a rebuild. I was suggested a L. Collari engine by someone at my local shop and was wondering if anyone else has any experiences with these. The price is about $100 less than another RB or an OS. Or maybe just some other suggestions on decent engines that dont break the bank

[auto2]

are Ft and rear axles the same on the works XR and mbx5?
I just bought a set on ebay and hope I didn't screw up/LOL!
the part numbers are the same at mugen web site.

[speedydave]

Anyone here turned their MBX4 into a truggy, or done the JT conversion to it yet? I'm in the process of completing a deal for a used Rex P5 that I wanted to put into a truggy, and I think my old MBX4 would be perfect, since JT makes the conversion. Anyone have any ideas or comments? Also, is there anyone that would be willing to sell their set of rear Big Bore shocks(w/3.5mm shafts)? Thanks.

[auto2]

what is the difference between C0260 and C0267 axle shafts?
I bought an mbx5 axle on ebay for my mbx4xr
It fits perfect but the shaft dia is a good MM smaller than my XR axles

what is the difference between all mbx5 and 4XR alxes? optional ones and stock ones?

Is the MBX5 shaft supposed to be thinner?
Maybe the axle I got on ebay was incorectlly described?

Or is the MBX5 axle better metal and made thinner lighter and stronger?

[FlyinRazorback]

I ordered the JT conversion today for my XR. If anyone has any tips or pointers they can share I would be most appreciative. I have only raced 1/8 scale, so the MT racing is new to me. Any advice for MT's will be welcome.

[ApriliaRacer]

On the pre-owned MBX4 I have, it has MIP CVDs.

When I go to the MIP site there is nothing listed for the MBX4, so it must be another cvd that works.

Does anyone know which it may be?

TIA

[auto2]

http://www.miponline.com/CVDmugen.html

[TheRo0sTer]

Well it was mine for about a week! Sold it because I got a GREAT deal from TexBouncer for an X5!:p

http://www.teamapoc.co.uk/images/upload/Everything.jpg

[primuswoostinkinhoo]

i have an rr with a rex sbk, and i ran it on a fairly tight, pretty much blue grooved track last night for the first time.

first problem is its not accellerating very well unless the rpms are way high, new clutch set up? any sugestions?

second problem, ive got alot of push, i mean a ton, im running 1/10 scale truck hole shots on my car, with black springs up front and light blue in the rear with 35 wt in front 40wt in the rear
anyone have any sugestions as to how to get more high speed steering?

[primuswoostinkinhoo]

there are some pics of my ride here(no motor or electronics in it tho)
my ride (http://www.angelfire.com/ab5/******)
well scratch that idea, seems angelfire is too good for this here bb
after the ab5/ the word there is ****** if you would really like to see my cars
my goodness they wont let me do anything here
the word that goes there is rc pics with no spaces

[auto2]

so did you get your JT kit in yet?:-)

only advise I can think of is remember with larger tires your flying in the air stuff will be more sensitive to the gas and brake.

[FlyinRazorback]

auto2,
No, I haven't received it yet :( :mad: I ordered it on 12/01 with USPS Priority shipping and it still isn't here. The guys at Renegade (where I ordered it) say that it is being shipped directly from JT and should have went out this past Monday. I hate to wait.

[auto2]

am I correct it is cheaper from Renagade than direct from JT?
didn't renagade have an "out of stock" thing next to the parts??

[FlyinRazorback]

Yes, it's $30 cheaper through Renegade. They are in stock now.

[primuswoostinkinhoo]

anyone racing mbx4's anymore? i need some help setting mine up, i need a starting point

[primuswoostinkinhoo]

hers a pic of my ride
http://img6.photobucket.com/albums/v16/mbxb4/cars/mbx42.jpg

[FlyinRazorback]

Here's my review on the MBX4 / JT conversion build-up.

http://www.rcnitrotalk.com/forum/showthread.php?s=&threadid=10647

[speedydave]

Looks awesome! Makes me wish I weren't selling my MBX4 XR...I guess I'll just wait until JT makes a conversion for the MBX5. :D

[auto2]

nice job making it and really nice job documenting and keeping us informed!!

My only thing holding me back is I'm waiting for the genisis to come out and then decide which I want.
I really can't rationalise a MT2 - genisis- AND a mugen MT.

[speedydave]

So, I noticed there are more pics in that webshots album, with pics of the truck completed. Run it yet? I got out of the deal with my MBX4, looks like I'm going to JT it after all. :)

[FlyinRazorback]

speedydave,
This Sat. will be the first day to run the truck. I will let you know how it goes. The pics don't do it justice though. A buddy of mine took a look at it and ordered the kit right away. :D

[FlyinRazorback]

I ran the JT conversion yesterday for the first time. I was impressed with the way it handled. I actually had too much steering and had a little trouble getting it to line up on the jumps. There are a long series of S-turns on the track and I was flying through them gaining at least 1.5 - 2 sec's on the field. I run with toe out on the front with my buggies, I would run with 0 toe on truggy. Acceleration was good even with the C5 and nothing could touch it on the 125' straight. All in all it was a good night for my first time racing MT's. I TQ'd and won the main. I have some tweaking to do, but this thing is a blast to race.

[CaseyDDR]

Hey, I jus did a trade for a Mugen MBX 4 XR Works, and this is going to be my first 1/8th scale buggy. Will I still be able to be competative with this, or would I be better off using this is a basher buggy, and buying like a Hyper 7 PBS or something? Is this X4 still capable of keeping up with the new dogs? Most of what is run at my LHS track (indoor) are Ofnas, so I'm thinking I shouldn't be to far off.

[primuswoostinkinhoo]

an mbx4 will keep up just fine, did you happen to get any extra parts with it? im in need of rear turnbuckles, or does anyone know wher i can get a set?

[YZ400Man]

I might be able to make a trade for an plain MBX4. I was wondering if anyone could tell me if it is possible to upgrade it to an XR. What parts are different and such. Thanks in advance.

[primuswoostinkinhoo]

the xr has a differnt center diiff and motor placement if im not mistaken, the xr has universals all around, a trick asss center diff mount fits on the rr, differnt radio tray posts which fit on the rr, turnbuckls instead of threaded shaft doohickeys, i dunno what else is differnt tho, but i do think the rr and xr have a differnt chassis. i have an rr with some upgraded parts im able to keep up with the other guys, when i dont crash or have my motor flame out or my battery comes disconected lol

[YZ400Man]

Thanks for the quick reply. I think this is going to be a good deal for me, I just wanted to make sure that I wasn't going to regret it in a few months once I learn how to drive a little. Keeping up with the other guys won't be my initial concern, keeping it off of its lid will be......lol. Any more help on differences between the original MBX4 and the XR will be appreciated.

[primuswoostinkinhoo]

the real main things are the 100 plus dollar center diff mount on the xr, the tunrbuckles and the universals

[YZ400Man]

Does anyone know where I might be able to find a new chassis for my XR? I bought a used XR and the chassis is straight, but pretty beat up. I would like to see if I could get a new one.

[primuswoostinkinhoo]

nitrohouse.com should have one

[Vmax911]

Are hopups still available for the XR? It seems a lot of places have hopups for the new X5, but not the older line. Any links would be appreciated.

[wild gopher]

look up one post and go there, its under mbx4 xr hopups

[Vmax911]

Thanks... a few more questions:

The mugen braces attach both front and rear gearboxes to the center diff. I thought a remembered an aftermarket rear brace that goes from the rear gearbox to the chassis, like the stock one. Does anyone know who made that or where it might be available.

Are there any aftermarket shock towers available?

Lastly, are the gears shown on the hopup page for the mbx4 on the nitrohouse site different from those that came stock in the XR works kit?

[wild gopher]

hmm, looking at my XR the rear brace goes from the rear diff to the chassis, and the front brace goes from diff to diff. As for shock towers, I havent seen any aftermarket ones but im sure there are some carbon fibers floating around there somewhere. I think those gears on the hopup page are the ones that came originally with the XR

[primuswoostinkinhoo]

i think racers edge used to make shock towers for the mbx4, i may be wrong and they may not make them anymore but someone out there used to make some cool shock towers for it, my buddy had them maybe a yr and a half ago

[hubgrunch]

VMax911 Goto
rc-nation.com
they have some fioroni parts for the mbx4. I just purchased the fioroni front shock tower for mine. they are very good to deal with and have very fast shipping.

[chevelledude33]

does the mbx4 buggy have any weak spots? do any of mbx5 parts fit it? how much are used ones going for? :)
thanks. i dont wanna get ripped off

[clizoman05]

yeah lotsa mbx5 parts fit on the mbx4... diffs, shocks, screws and maybe some more but i havent really experiemented but those 3 are definite.

[chevelledude33]

thanks i think i might get one then. :)

[EastCoastSurfer]

Does anyone know where I might be able to find a new chassis for my XR? I bought a used XR and the chassis is straight, but pretty beat up. I would like to see if I could get a new one.


Sup guys, How are yall doin, im good here. Well just a lil tip. Dont get the stock chassis again. The Fioroni and the stock chassis are the same Amount of money. Get the Fiornoni chassis this time. You'll be happy you did. Its stronger and looks a hellova better. Later

[MBX4RR]

Sup guys, How are yall doin, im good here. Well just a lil tip. Dont get the stock chassis again. The Fioroni and the stock chassis are the same Amount of money. Get the Fiornoni chassis this time. You'll be happy you did. Its stronger and looks a hellova better. Later

I wanted to get some Fioroni parts but couldnt find any for my MBX4RR. What sites carry Fioroni.

[MBX4RR]

Here is a pic. of my car

www.msnusers.com/g8kekfrpe5ea0J2gbeu6f8n0e7/Documents/pictures%2Fcar%20001.jpg

[MBX4RR]

This will work, click on "pictures" on the left of the screen
www.msnusers.com/gascars

[DLF]

Does anyone by chance know if the ergal shock towers on rc-nation.com are less seceptable to bending? I've never used them but I'm tired of replacing the stock ones when they bend. I assume they are machined aluminum. Is this correct?

[MBX4RR]

Does anyone by chance know if the ergal shock towers on rc-nation.com are less seceptable to bending? I've never used them but I'm tired of replacing the stock ones when they bend. I assume they are machined aluminum. Is this correct?
+
yeah they are machined aluminum, the difference is that they have cutouts and more holes for adjustment. Not sure about strenght though, probably about the same as stock aluminum towers. How do you bend the shock towers, haven't done that one yet. :rolleyes:

[DLF]

Well, I'm sure mainly from the car landed on it's top. I'm not that bad of a driver, but I've been racing this buggy for a few years now and I've had to replace them a few times. :rolleyes:

[auto2]

National RC G1 braces.
could someone point me a link I'm having trouble finding it.

auto2@optonline.net

[auto2]

I see mugen took the set ups for the XR off their site.

Could someone point me in a direction of a few setups for loomy dirt with a big triple jump and a slow technical section? 150 foot straight

[Pizzagod]

Hardcore Racing Components has titanium parts for the MBX4 line.

http://www.racinghardcore.com/

Shock towers, front or center brace, radio tray, steering linkage and brake calipers. All in titanium, and originally available in blue, green, purple and silver.

They also have a carbon brake disk.

For $324, you can have one of each. :p Yep, they are pretty pricey. But, a titanium front shock tower may be a good investment...


i think racers edge used to make shock towers for the mbx4, i may be wrong and they may not make them anymore but someone out there used to make some cool shock towers for it, my buddy had them maybe a yr and a half ago

[Pizzagod]

I have an extra (new) Owners Manual for the Mugen MBX-4RR, if anyone is looking for one. $7 shipped (to U.S.). International shipping may be a little more.

[Pizzagod]

anyone know a website that has a parts list for the mbx4rr, or does anyone know the part number for the 4 gears inside the diff? i need to order it, but i need a part number

They are C0222B.

[Pizzagod]

I have an extra (new) Owners Manual for the Mugen MBX-4RR, if anyone is looking for one. $7 shipped (to U.S.). International shipping may be a little more.

I found that I actually have 2 of these manuals. I've sold 1, and now I have 1 more available. $7 takes it!

[Pizzagod]

I have an extra MBX-4RR that I'm not currently using, and I'm considering doing the truggy conversion. It looks pretty simple, and shouldn't be too expensive.

I'm used to driving my Tamiya Terra Crusher, and I'm wondering if someone can tell me how a 1/8-scale buggy converted to a Monster Truck performs, compared to a real Monster Truck. If it performs well, I can sell my Monster Truck (and backup Monster Truck), and consolidate my spare parts (to share most of them between my buggy and truggy).

Any thoughts are appreciated.

[auto2]

I think it's a great idea.
I have a xr and used to have a truggy.
the only problem with the truggy is the spur gear costs 70 bucks. waste a clutch bell bearing or otherwise and it can get expensive assuming you have a spare on hand.

I never drove a real MT but watching the truggy is the thing to have on the track.

but geet the smallest tires your allowed( tmaxx size) don't get the 40 series prolines. I think they are too big for the servo saver

[auto2]

I have a question.
spring colors? stock is silver.
how do the color line up?

white is hardest-then green- then blue -then silver?

[med511]

I just picked up a used XR Works for my first buggy. Too good a deal to pass up. Hopefully I'll be able to find parts although it's coming with a pretty good supply. Does anyone have a good setup that still runs these units? Any help would be great. Also, who would be the best source for parts? I know Nitrohouse has some and of course Ebay...anywhere else?

Thanks, MED

[med511]

Also, if you can't find a MBX4 body, what is the next choice? Will a body for a MBX5 fit the 4?

MED

[Pizzagod]

MBX-4 bodies are still all over the place. You shouldn't have a problem there, as there are still quite a few MBX-4s out there. They'll keep making them, as long as they keep selling.

I don't know if the body for an MBX-5 will fit.

[med511]

Hey Thanks Pizzagod. I'll keep looking. i did find out for sure today that the MBX5 would not fit.

Thnx, MED

[schnitzer]

No offense but the MBX-5 does fit as I have it in my X4. Just need some trimming thats all.

Cheers

[med511]

Thanks Dude, that's very good news. I thought that was a little odd since most of these buggies are very simular in shape. I figure if I can get a Taurus oval body to fit on a RC10GT I can I can trim most anything. LOL!

MED

[tphss]

Can someone here please try to tell me if I bought a MBX-4RR or the MBX-4XR?
Here is the link:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5945420904

Thanks.

[auto2]

MBX4 rear shocks are in front of the rear tower, diffs are aluminum case

RR didn't have the aluminum center diff mount and had universals up front instead of cv axles

XR has the engine moved back and hasCV axles all the way around.

I guess the best way to tell is if you measure your engine mount holes in relation to the rear of the chassis and I can compare it to mine. ( I have 2 Xr's)

I would love to see a list of all the differences posted someware.

BTW that is a great price you got!

I'm really wanting to get a MBX5 for next year but then I would have to sell my 2 XR's and they are like familly to me. they would be had to sell. LOL!

[tphss]

Thanks auto2,

It's a MBX-4RR I bought apperantly.
I don't know if I will keep it cause it's discontinued and hard to get parts for.

[Pizzagod]

I have a complete MBX-4RR roller, including an extra chassis and a few other parts, that I'm selling for $145. That way, you'd be guaranteed that you have spare parts.

I have recently gotten into the habit of buying 2 of whatever vehicle I plan on racing. That way, I always have the spares I need, even if the local shop is out of stock.

I had been thinking about converting it to a truggy, but the truggy kit is $169, and I really didn't want to spend that kind of cash, since I already have 2 monster trucks.

[tphss]

Well I did a Mistake basically, I wanted the MBX-4XR, I don't think I will keep it.
I wanted a High end buggy, I think i'll end up maybe finding a Kanai 3 and selling this one.
I already have an old Inferno and I know what kind of a pain it is when you can't get parts.

[Pizzagod]

Whether you had purchased an XR or an RR, they're both going to be as difficult to get parts for. They've both been discontinued.

Almost all of the parts are interchangeable between the XR and the RR. The main difference between them is that the center diff and engine were moved back a little bit. So, that makes things like driveshafts and chassis supports have different sizes.

Here are some other differences that the XR has from the RR:

- Aluminum center diff mount
- CV axles
- CV driveshafts

The original version of the XR also overdrove the front, but they changed that after a little while.

A Kanai 3 would probably be a good bet, if you don't want to scrounge for parts. There are quite a few MBX-4 variants out there, so getting parts here-and-there wouldn't be too hard for a while, but I anticipate it getting more and more difficult as time goes on (just like any vehicle).

Some vendors support their vehicles for what seems like forever. For example, I can still find quite a few parts for my Associated RC10T (didn't they come out over 10 years ago?). I've also heard that Tamiya guarantees parts support on their vehicles for at least 10 years. I have no idea what Mugen's parts-support policy is.

From what I've heard, some of the parts from the MBX-5 will fit on the MBX-4 series, like the shocks and wing. I think the axles fit too.

In any case, good luck.

[mscjakes]

newb with my mbx-4RR here I was wondering if a mbx-5 shock tower will fit on a mbx-4RR

[Pizzagod]

I don't have one to test, but I'm about 99% sure that it won't fit. I think I read it on another forum.

[mscjakes]

What companies still make upgrades for the mugen mbx-5 xr or rr

[Pizzagod]

Nitrohouse.com still has items listed for them. I don't know about 3rd-party parts, but Nitrohouse has the Mugen-brand ones.

[mscjakes]

Does anyone know the part number for the rear toe blocks for a mbx-4?

[nitrohouse]

No the MBX 5 is completely different, except the cva's, and diffs.

For the older MBX 4 it is part #C0170 its kind of "Z" shaped

For the XR, and the RR it is part #C0181(2 deg) its kind of "C" shaped

Both are alum. and purple anodized...

Have Fun...Burn Nitro...

[Vmax911]

Anyone here converted an XR to a truggy? What modifications need to be done. I assume a larger spur or smaller pinion would be needed for the larger tires. What about offset wheel hubs?

[EZM]

Hey im new to mugen buggies and want to know whats the better buggy vetween the mb4-4 rr works and mbx-4 xr works? does the xr have works im not sure, i just want to know what edition mbx-4 buggy is the best in quality potential, and overall best parts like diffs,shocks etc. thanks. if the rr works is not the best how much better are the other versions?

[Pizzagod]

There is no RR Works. There's and MBX-4RR and an MBX-4XR Works.

The XR Works is the successor to the RR, and has a few upgrades. These include moving the diff back to give more rear traction, CVDs all around, and different gearing in the front diff (this was changed, and then I believe it was changed back). Oh, the XR Works also has an aluminum center diff mount. There used to be an RR -> XR conversion kit, but I think it was missing the diff mount.

It's all a matter of preference, but Mugen came out with the MBX-4 first, the MBX-4RR next, and the MBX-4XR Works last. Most (probably 95%) of the parts are interchangeable.

Any of the 3 will do what you need them to. If you can find an XR Works, it'll have some nice upgrades. I moved from an RR to an XR Works. I can't say I notice a lot of difference, but maybe a little.

I have an RR roller for sale, if you're looking...


Hey im new to mugen buggies and want to know whats the better buggy vetween the mb4-4 rr works and mbx-4 xr works? does the xr have works im not sure, i just want to know what edition mbx-4 buggy is the best in quality potential, and overall best parts like diffs,shocks etc. thanks. if the rr works is not the best how much better are the other versions?

[Pizzagod]

You can check out some instructions at:

http://jtracingproducts.com/mbx4%20conversion.html

I didn't see anything for the XR, specifically (everything they refer to just says Mugen MBX-4), so I don't know if this one will work. It does look like the pictures show an aluminum center diff mount, so I'm guessing they made the mod to an XR. You're probably fine with any of the MBX-4-series models.

Anyone here converted an XR to a truggy? What modifications need to be done. I assume a larger spur or smaller pinion would be needed for the larger tires. What about offset wheel hubs?

[EZM]

also what is a good price for an xr mbx-4 used but in good cond?roller.

[EZM]

also how else can i tell between an xr and rr besides the alum center diff mount?

[Pizzagod]

The slot for the center diff gear moved back behind the chassis screws that are located about mid-point on the chassis (on the outer left and right edge).

The XR should also have CVDs on all axles, and shouldn't have dogbones for the driveshafts.

also how else can i tell between an xr and rr besides the alum center diff mount?

I don't really know what a good price for an XR Works would be. It really depends on the condition, and what it comes with. I'm selling an RR roller for $119, and I believe that's a good price, so I'd say an XR Works roller might be a good price at maybe $149 or less...

[EZM]

Is this an xr or rr? what do you think?

[EZM]

oops forgot the pics here it is.
http://i36.imagethrust.com/p/129638/untitled2_jpg.html

http://i25.imagethrust.com/p/129648/untitled_jpg.html

[Pizzagod]

Yep, looks like an XR Works.

It has the aluminum center diff mount, universals for drive shafts, and has the cutout for the center diff gear behind the screws I was talking about.

From those pictures, I can't tell if it has the CVDs installed, but it's a safe bet.

Oh, also, I think the XR Works came with big bore shocks. Maybe someone else can confirm this... In any case, that's a good-looking buggy. If the price is what you're looking for, I'd go for it.


oops forgot the pics here it is.
http://i36.imagethrust.com/p/129638/untitled2_jpg.html

http://i25.imagethrust.com/p/129648/untitled_jpg.html

[EZM]

how much do you think that buggy is worth or how much would you pay honestly?

[guswiththemugen]

The XRWorks had the 3mm shock shafts, not the 3.5mm, or big bore shocks, not that their shocks were weak. I've never broke one in my XR.
I dont know what an XR is worth second hand but they seem pretty cheap for what your getting, they are still a high quality buggy compared to a lot of current buggys.
They are very strong and they are a Mugen = quality.
They have all the adjustments you will ever need to set it up for different surfaces and tracks and you can strap in any engine you want and not worry about the driveline. You wont be dissapointed with an XR.
Im seriously thinking about snapping up another XR second hand as i have another engine and two sevos without a home and you can get XRs cheap from what i've seen. Set it up and i'll have another great buggy ready to go.

[Pizzagod]

Jod,

I received your questions about the MBX-4, but you have private messages turned off in your profile, and I can't send one back. Turn them on, or give me your e-mail address, and I'll get back to you.




(Apologize for the public posting, but Jod PM'd me regarding a post in this thread, and this is the only way I can get back to him).

[westernthreads]

are the diff gear the same for the mbx-5 to put in a mbx-4 the parts number s are different but no t available (co222a - co222b)MBX-4 (co2229-co2230)MBX-5

Please let me know a melted the center diff.

Thanks

clmorgan@westernthreads.com

[tborisch]

I am new to buggies, and just bought a older used MBX4 XR Works car from a racer that was getting out of the sport. I can't beleive how fast these cars are! I am a 1.0 inch outrigger racer at heart...

Anyway, onto my question. I am wondering if the MBX-5 body will fit the MBX-4 XR Works car. If not, what will work? Also, are there any good piggy back shocks for this car?

Thanks ahead of time for any help!

Tom

[guswiththemugen]

You may get the MBX5 body to fit but i dont think it would be worth it from all the cutting you will need to do. Why do you want that body? Are you having trouble getting the XRWorks body? Or just like the look of it?
Piggy back shocks are not needed. Mugen shocks are the best you can get. If you want to upgrade the shocks, you can get the MBX5 shocks with the bigger shaft, but, they wont perform any different from the XR shocks, they will just increase durability. (allthough the XR shocks are very strong)
Good to hear your happy with your purchase. You have a great buggy there.

[tborisch]

Thanks for the info. Yeah, i like the look of the MBX5 body allot, and I am not much of an artest, so buying a pre-painted body off ebay would be nice, but they are all MBX5's, no 4's.

Thanks!
Tom

[freddan]

Actually I think the XR shocks have 3.5 mm shafts so they are just as strong as the mbx-5 shocks. The XR buggy is a great buggy.

[guswiththemugen]

The xr came with 3mm shafts.

[1 Mugen racer]

Hello,

I have recently got my self a Mugen MBX5R. Whats the differnce with it and the MBX4?

Any reply would be great.

[rcpilot_971]

can you still get parts for the mbx4 xr

[antone]

If anybody is looking for a backup Mugen MBX4 xr works buggy to run or for parts I have a rolling chassis that I need to get rid of. The Buggy is brand new never run or touched the dirt. It has the front blue, white, and grey option springs still all in the package. This buggy is in mint condition. I had intentions of racing it but I got deep into 1/8 scale onroad. I am looking to make a quick sale on it. I need the money.

[AdamMarquez]

im about to purchase a mbx 4xr for 175 and he said that it was converted to an mbx5t is this possible? Ive been reading that parts from the 5 were not backwards compatable to the 4. Also wondering if hes just talking about the JT conversion for the 4xr, do they still make parts for this thing?

Any help would be very much appreicated.


Thanks,
Adam

[antone]

I really don't know much about this conversion for the mbx 4. I would have to say that its not worth dumping money into an old car I would just race it as it is. If you want a truggy I would suggest waiting and seeing what the the manufactures are coming out with in 2008. If I were you I would put your money towards a new truggy or buggy cause honestly its going to be tough to find parts for the mbx 4 buggy thats why I sold mine unless you are going to do backyard bashing with it. If you plan on racing go with something new less headache locating parts for it. I hope this helps answer your questions and you decisions.