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R/C Tech Forums Thread 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 12-20-2013, 09:48 AM   #9061
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Quote:
Originally Posted by K_King View Post
Interesting. I wonder why metal to metal is preferred.
Would that make it louder when running?
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Old 12-20-2013, 09:53 AM   #9062
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Quote:
Originally Posted by K_King View Post
Interesting. I wonder why metal to metal is preferred.
i dont know what you guys are talking about. per kyoshoamerica.com:

UMW718 VVC Aluminum Drive Gear (26T/MID Motor)
Velvet coated aluminum idler gear for RB6/RT6 mid motor.
Frees up transmission by using plastic/metal/plastic/metal configuration.
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Old 12-20-2013, 10:40 AM   #9063
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Originally Posted by glenng View Post
i dont know what you guys are talking about. per kyoshoamerica.com:

UMW718 VVC Aluminum Drive Gear (26T/MID Motor)
Velvet coated aluminum idler gear for RB6/RT6 mid motor.
Frees up transmission by using plastic/metal/plastic/metal configuration.
You are right

http://www.kyosho.de/shop_image/atta...932f554920.pdf
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Old 12-20-2013, 10:53 AM   #9064
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That's what I thought. . ^^ it would be loud if it was metal to metal gearing..
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Old 12-20-2013, 03:33 PM   #9065
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Metal/metal/plastic/plastic makes absolutely no since. So when's all these upgrades gonna be available?
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Old 12-20-2013, 03:34 PM   #9066
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They're available now.
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Old 12-20-2013, 04:39 PM   #9067
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They're available now.
Hey, k, I see you have b fast in ur sig. Do you run one in your 6?
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Old 12-20-2013, 04:47 PM   #9068
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Yes sir! They are really good. I used to sand my rings but this is definetely the way to go to make sure they're smooth.
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Old 12-20-2013, 05:02 PM   #9069
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Default Help with a few things????

Wondering if someone can explain a few things to me.
First question... in the manual don't know what "Skid Angle" is and what it affects>.. if someone can clarify that for me that would be great.

Second question is about the kyosho rear suspension holders. In the picture you see that i have the aluminum "RF" and the Rear holders. (forgot to say im running midmotor) and ive seen the instruction sheet but im having a hard time understanding? Is the RF supposed to have the adjustable inserts like the rear or not? And if i have the right ones do i only adjust the rear? HELP>>>
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Kyosho Ultima RB6 & RB6.6 Car Thread-_mg_8548%5B1%5D.jpg   Kyosho Ultima RB6 & RB6.6 Car Thread-_mg_8550%5B1%5D.jpg   Kyosho Ultima RB6 & RB6.6 Car Thread-_mg_8552%5B1%5D.jpg  
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Old 12-20-2013, 05:16 PM   #9070
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Originally Posted by K_King View Post
Yes sir! They are really good. I used to sand my rings but this is definetely the way to go to make sure they're smooth.
I thoug the kyosho diff was supposed to be just as good? my lhs carries them in stock and I was either gonna pick up an extra kyosho set or a b fast set but didn't know which one to get.
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Old 12-20-2013, 05:43 PM   #9071
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With the Exotek diff nut, is everybody using the included 1mm black spacer?

Also, I'm running it with MIP Pucks diff hubs, does that matter?

Lastly, should it be tightened until it bottoms out? Or do you back off a certain amount after bottoming out?
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Old 12-20-2013, 05:50 PM   #9072
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my exotek diff nut package didnt come with a black spacer
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Old 12-20-2013, 05:55 PM   #9073
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Originally Posted by spdrac430 View Post
my exotek diff nut package didnt come with a black spacer
i think it should have.

http://www.exotekracing.com/rb6-alloy-diff-nut/
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Old 12-20-2013, 06:13 PM   #9074
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Okay, I just figured it out. I have 2 packages of diff nuts from Exotek - one came with the spacer, the other did not (both totaling the same length).

I installed the longer one first (with no spacer), then did a double-take when I was looking at the package for the shorter one with the spacer. The instructions are different for each (one showing a spacer, one not).

Okay, so 2nd question!

Should it be bottomed out? Mine is, and it feels smooth.
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Old 12-20-2013, 06:37 PM   #9075
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Quote:
Originally Posted by omarsez View Post
Wondering if someone can explain a few things to me.
First question... in the manual don't know what "Skid Angle" is and what it affects>.. if someone can clarify that for me that would be great.

Second question is about the kyosho rear suspension holders. In the picture you see that i have the aluminum "RF" and the Rear holders. (forgot to say im running midmotor) and ive seen the instruction sheet but im having a hard time understanding? Is the RF supposed to have the adjustable inserts like the rear or not? And if i have the right ones do i only adjust the rear? HELP>>>
Slip angle is essentially side bite. More angle, which the manual refers by running 2 deg anti squat is looser than running the .5 shim.
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