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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
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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 01-21-2013, 07:56 PM
  #4546  
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Originally Posted by joeymdz
(Thank you Brandon for your help and ideas)
Lookin good! And you're very welcome

Originally Posted by HalfManHalfGod
Is there a guide on how to read the setup sheets? I understand how to setup my car following the sheet but what effect will it do? Like what would 1mm shims on the ackerman do? Shims under ball studs etc.
This is your new bible:

http://users.telenet.be/elvo/
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Old 01-21-2013, 07:58 PM
  #4547  
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Originally Posted by seth556
Hey guys, I just got the RB6 and it drives well but it's like I have to drive it very carefully as it wants to drive all from the front. Going into the corners it feels good but then wants to pivot on the front way too much. It seems very characteristic of rb6's. Plenty of forward grip, just need it to be more lazy in the middle of the corner. It's fast, just feels like it always wants to kill me in the middle of the corner.
You either have a glaring setup issue, a static weight issue, or a tire/insert issue. Without looking at your car, tires and inserts, its impossible to tell. Post your complete setup, and make sure everything is true, even, measured, and accurate based on the setup sheet first. Then trade tire with another rb6 on the track to make sure you don't have a tire problem.
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Old 01-21-2013, 08:19 PM
  #4548  
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Originally Posted by seth556
Hey guys, I just got the RB6 and it drives well but it's like I have to drive it very carefully as it wants to drive all from the front. Going into the corners it feels good but then wants to pivot on the front way too much. It seems very characteristic of rb6's. Plenty of forward grip, just need it to be more lazy in the middle of the corner. It's fast, just feels like it always wants to kill me in the middle of the corner.
When the weight transfers to the rear?

There are a few ways to fix this, it could come down to putting closed cell foams up front. This really tamed down the car for me.

Or making changes to your setup.

Give us more info, then we'll be glad to help you out.
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Old 01-21-2013, 08:27 PM
  #4549  
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Originally Posted by Cpt.America
Lookin good! And you're very welcome


This is your new bible:

users.telenet.be/elvo/
I've read most of that but i'm not sure how to translate that to the setup sheet. For example ackerman:

More
(Bigger difference in steering angle
between the two font wheels) More Ackermann makes the steering more consistent, and smoother.
It just feels right, also at low speeds and in tight turns.
Less
(Smaller, or no difference in steering
angle between the two font wheels) Less Ackermann makes the steering more agressive at high speeds.
The car turns in more agressively.
It doesn't work well when either traction or cornering speeds are low.

Would putting shims on the ballstuds that attach to the ackerman give me more or less ackermann?

My track I would consider small with high traction clay that has 3 180degree hairpin turns. I want to be able to make as tight as a turn as I can and carry as much speed as possible.


Another stupid question: What is the easiest way to detach the turnbuckles from the ballstuds? I know i'm doing it completely wrong.
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Old 01-21-2013, 08:44 PM
  #4550  
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Originally Posted by teeforb
so the losi 22 servo horn fits with zero issue or hacks?
Originally Posted by Trevor Williams
my kyosho gunmetal servo horn fit perfect with no issues.....

why TLR?
The losi is similar in color and is all aluminum, no plastic inserts. I had to drill the threads to fit the Kyo ballstud(I used a body reamer and just enlarged both sides), i put a 1mm shim behind the ballstud to make it very very close to OEM Kyosho offset and a nut on the backside. I know someone will ask so i'll post a pic asap

On a side note i won the A main tonight, but broke a ballcup off in a qualifier. It broke right where the turnbuckle ends inside it.




Last edited by Just1More; 01-21-2013 at 09:08 PM.
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Old 01-21-2013, 08:59 PM
  #4551  
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Originally Posted by HalfManHalfGod
Is there a guide on how to read the setup sheets? I understand how to setup my car following the sheet but what effect will it do? Like what would 1mm shims on the ackerman do? Shims under ball studs etc.
Well worth the money!!!

http://www.teamassociated.com/news/l...ts_iPhone_App_
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Old 01-21-2013, 09:31 PM
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Guys to let you know Diggity Designs has some new carbon fiber parts for the Rb6 car.
http://www.diggitydesigns.com/ is a link to his site. Great guy to deal with also.
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Old 01-21-2013, 09:52 PM
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Originally Posted by K_King
Setup and track type?
It's the new Tebo CRCRC setup. During the day I put on the .5 hubs and it was only a little better, still the same main tendency to want to slide mid corner. Track is indoor, decent traction, and small.
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Old 01-21-2013, 10:00 PM
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There's your issue, put the kit setup on it and let us know what you think.

And definately take out the limiter and put long ball ends on the rear and med. on the front shocks.
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Old 01-21-2013, 10:04 PM
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Originally Posted by seth556
It's the new Tebo CRCRC setup. During the day I put on the .5 hubs and it was only a little better, still the same main tendency to want to slide mid corner. Track is indoor, decent traction, and small.
Is it exactly tebos set up? Remember that track has tons of traction and it was huge! May e you should look at a different set up.. Brandon has a great one!! (shameless plug)
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Old 01-21-2013, 10:05 PM
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Originally Posted by joeymdz
I've been using the for a while now. Handy app
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Old 01-21-2013, 10:19 PM
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Why does the Cody Turner setup call for um510-02 axles? I understand they are a different length but what's the reasoning behind using them?
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Old 01-21-2013, 10:22 PM
  #4558  
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Originally Posted by teeforb
That seems the defeat the purpose. The plastic that fits on the servo is the 1st to give.
I have had the same one on my RB5 WC & RB6, with another on my RT5 without any problems...
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Old 01-21-2013, 10:40 PM
  #4559  
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Originally Posted by Jtipsy
Guys to let you know Diggity Designs has some new carbon fiber parts for the Rb6 car.
http://www.diggitydesigns.com/ is a link to his site. Great guy to deal with also.
They still have the same parts posted that they've had for a good while...
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Old 01-22-2013, 01:04 AM
  #4560  
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Originally Posted by fullsyzz
Why does the Cody Turner setup call for um510-02 axles? I understand they are a different length but what's the reasoning behind using them?
Hi fullsyzz,

The reason we're using these axles is because we are using the narrow suspension arm mounts (UMW511+UMW512), using these mounts narrows the rear end of the car by about 2mm, in order to counter act that we use the longer axle (UM510-02) with a 1mm axle washer(W0149GM) between the hub and the wheel hex.

Hope that helps.

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