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Kyosho Ultima RB6 & RB6.6 Car Thread

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Old 12-21-2016, 08:46 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Kyosho Ultima RB6 & RB6.6 Car Thread
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
Last edit by: tobamiester
RB6.6 Kyosho America Product Page: http://www.kyoshoamerica.com/ULTIMA-...T_p_24505.html

RB6.6 Manual http://www.kyosho.com/jpn/support/in...A_RB6_6_IM.pdf

RB6.6 Kyosho Youtube https://www.youtube.com/watch?v=vW_sR667utY

MSRP $639 MAP $399.99

-------------------------------
New RB6.6 parts (compared exploded views, prices and links are Kyosho America):

Chassis:
  1. Main chassis - UM731 - $125.99
  2. Side guards - UM732 - $9.99

Battery Holder:
  1. Battery plate - UM733 - $8.99
  2. Battery foam - UM741 - $7.99

Rear Bulkheads:
  1. MM3 and Laydown - UM740 - $9.99
    • MM3 bulkhead
    • Laydown bulkhead
    • Swaybar Holders

3 Gear Transmission (MM and RM):
  1. Transmission - UM734 - $10.99
    • transmission cases
    • spacers
    • caps
    • plastic FR & RR suspension hangers

  2. Gear Cover - UM735 - $6.99

Laydown Transmission (3 and 4 gear possible):
  1. Transmission - UM736 - $10.99
    • transmission cases
    • spacers
    • caps
    • required extra hardware
    • pastic FR suspension hanger

  2. 40T idler - UM737 - $6.99
  3. Motor plate - UM738 - $18.99
  4. Gear cover - UM739 - $6.99

Body:
  1. Blade body - UMB05 - $27.99

Optional Parts:
  1. Lightweigt Blade body - UMB05LW - $31.99
  2. Aluminum FR suspension hanger - UMW705B - $28.99 (may be able to file UMW705 to fit)
  3. Brass FR suspension hanger - UMW725B - $30.99 (looks more different than UMW725..someone confirm?)

Typical Upgrades for new RB6.6 Buyers

UMW701 Aluminum Steering Plate (RB6)
UMW702 Aluminum Crank Arm (RB6)
UMW704-0 V2 Aluminum Rear Hub Set(0°/RB6)
UMW705B Aluminum Rear Sus. Holder (RF/RB6.6) or brass UMW725B
UMW707 Aluminum Rear Sus. Holder (RR-Mid)

Nice to have:

UMW723 Aluminum Front Sus Block (Type B/10g/RB6/RT6/SC6).


Aftermarket Parts:

Front Wing: https://www.prolineracing.com/perfor...mount-alum-rb6

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Old 04-30-2013, 11:15 AM
  #6496  
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Originally Posted by Wildcat1971
The JC b4 or JC TLR rears? I assume you meant B4. 3mm? are you sure, Those manufactures, like AKA, JC and others market those rears as for the b4, RB5/6 and tlr22. The main reason for the wheels nuts fitting seems to be the wheel thickness around the axle. I have some various wheels at home, but none of them have the same tire for an accurate comparison. If anyone has unmounted wheels, I would definitely like to see how the avid, aka, JC, Kyosho and other wheels measure. 3mm would greatly make the car feel different.
I was talking about the Jconcepts wheels that you buy for the B4.
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Old 04-30-2013, 11:18 AM
  #6497  
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Originally Posted by Cpt.America
I was talking about the Jconcepts wheels that you buy for the B4.
Hmm good to know. I have both I will measure track width tonight.
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Old 04-30-2013, 11:19 AM
  #6498  
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Personally I run the proline front wheels and either proline rears or kyosho. I like for the wheel nuts to be hidden and this combo allowed that and keep my width even f/r.
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Old 04-30-2013, 12:41 PM
  #6499  
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Measured the stockers against the jconcepts mono both unmounted brand new. The monos are around 0.75 to 1 mm less track width than the white kyosho ones. I made marks on my setup board with both mounted and kept from the edge. Photos a bit blurry but you get what I did.

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Old 04-30-2013, 01:31 PM
  #6500  
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I actually just mounted up a tire/wheel ready to go, and measured middle seam to middle seam on the tire.
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Old 04-30-2013, 01:51 PM
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Originally Posted by Cpt.America
I was talking about the Jconcepts wheels that you buy for the B4.
To his point Brandon, the JC Wheels are marketed as B4/RB5. They have a different part number for the 22.

http://www.jconcepts.net/store/index...roducts_id=535
http://www.jconcepts.net/store/index...roducts_id=536

22 - http://www.jconcepts.net/store/index...roducts_id=534
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Old 04-30-2013, 02:02 PM
  #6502  
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hey guys thinking of getting this car.

any weak points build tips?
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Old 04-30-2013, 03:59 PM
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Xray and Kyosho eh?
Check out the aluminium steering plate and rear bulkhead by exotek and maybe find some aluminium rear hubs.
See the 1st post for more details.
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Old 04-30-2013, 04:11 PM
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hubs more than anything, i have ripped a few ballstuds out. havnt broken anything else except for bending the front pin brace
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Old 04-30-2013, 08:13 PM
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i put some aluminum hubs on for a test run and broke an axle within the first couple laps. I think it doesnt allow for any give and makes the axles prone to snapping easier. I quickly put the plastic ones back on before I got hit with another $18 axle tab.
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Old 04-30-2013, 09:47 PM
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Originally Posted by wild gopher
i put some aluminum hubs on for a test run and broke an axle within the first couple laps. I think it doesnt allow for any give and makes the axles prone to snapping easier. I quickly put the plastic ones back on before I got hit with another $18 axle tab.
I'm pretty sure your axles were out the door. Sometimes freak accidental breaks happen
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Old 04-30-2013, 10:25 PM
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Originally Posted by wild gopher
i put some aluminum hubs on for a test run and broke an axle within the first couple laps. I think it doesnt allow for any give and makes the axles prone to snapping easier. I quickly put the plastic ones back on before I got hit with another $18 axle tab.
Iv run alu hubs on both my RB5 and 6, and have never broken an axle. Probably already weak from an earlier tumble. I wouldn't worry about the alu hubs.
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Old 04-30-2013, 11:27 PM
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Just bought my first rb6 coming from a b4.1 and rb5 before that. Bought the exotec rear bulkhead and steering rack. Few questions... Are the rear hinge pin braces a must? some say yes and some say no. Also i have a ton of wheels and tires for a b4. I know the fronts will not work but will the rears with the pin work?
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Old 05-01-2013, 12:18 AM
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So what parts are worth stocking ? any upgrades needed? which is a good base setup or good setup is manual setup?

where is a place to get a RB6 cheap, cant find anything below $449
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Old 05-01-2013, 12:31 AM
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Originally Posted by Jarred King
So what parts are worth stocking ? any upgrades needed? which is a good base setup or good setup is manual setup?

where is a place to get a RB6 cheap, cant find anything below $449
jarrod
the best place i have found is rc champ in japan fast postage cheaper and you should be able to get all you need from them
upgrades
the new front hinge pin brace
alu hubs 0 and .5
rear springs gold & white (x-gear)
front white (x-gear)
alu rear susp hangers wide and narrow
the thing is bullet proof so just arms and towers
and you should be set
cheers
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