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Old 12-21-2016, 08:46 AM   -   Wikipost
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 12-31-2016, 04:28 PM   #14041
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For a dirt glue track without a doubt go 3 gear laydown with shocks on the front of the arm and a ball diff in 17.5. Kyosho ball diff is butter smooth out of the package with stock parts, and lasts quite a while.
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Old 12-31-2016, 04:51 PM   #14042
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Why's this diff so smooth? After a couple months still smoother than my other buggy after a couple runs. Seems like an ordinary diff upon building. My other buggies' diff was the Bain of my existence. I have 2 extra Kyo diffs just sitting here waiting. Incredible


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Originally Posted by Jack Smash View Post
For a dirt glue track without a doubt go 3 gear laydown with shocks on the front of the arm and a ball diff in 17.5. Kyosho ball diff is butter smooth out of the package with stock parts, and lasts quite a while.
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Old 12-31-2016, 05:25 PM   #14043
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Quote:
Originally Posted by Jack Smash View Post
For a dirt glue track without a doubt go 3 gear laydown with shocks on the front of the arm and a ball diff in 17.5. Kyosho ball diff is butter smooth out of the package with stock parts, and lasts quite a while.
Thank you. I will go that route. I rally appreciate everyone.

How many of you have built the kit stock with no aluminum? I plan on just building it as is.
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Old 01-03-2017, 05:10 PM   #14044
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Got an RB6.6 kit for Christmas and it was the hardest build I've ever done. But it's gonna be so worth it. I'm now in the process of accumulating spares. Already got arms (F and R) and just ordered shock stays (F and R). What else tends to break? Also, what's the thought on the stock slipper? Is it worth it, does anyone use the Schelle?

Just saw this...
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Originally Posted by YANMAN View Post
Thank you. I will go that route. I rally appreciate everyone.

How many of you have built the kit stock with no aluminum? I plan on just building it as is.
As of right now, I am 100% stock and I'll likely stay that way for a bit. The only items that are even on my radar are the aluminum motor plate and aftermarket Schelle Slipper assembly.
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Old 01-03-2017, 06:07 PM   #14045
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Because the balls are tungsten carbide, they retail for like 30 plus dollars for a set of balls only.

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Originally Posted by JAE View Post
Why's this diff so smooth? After a couple months still smoother than my other buggy after a couple runs. Seems like an ordinary diff upon building. My other buggies' diff was the Bain of my existence. I have 2 extra Kyo diffs just sitting here waiting. Incredible
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Old 01-03-2017, 06:10 PM   #14046
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Originally Posted by RandyB View Post
Because the balls are tungsten carbide, they retail for like 30 plus dollars for a set of balls only.
This is by far the smoothest diff I've ever built.
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Old 01-03-2017, 06:34 PM   #14047
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Originally Posted by RandyB View Post
Because the balls are tungsten carbide, they retail for like 30 plus dollars for a set of balls only.
I don't think the kit comes with carbide balls. I bought carbide balls for a while and didn't really think they lasted any longer. Seems like the notchy feel comes from the groove that wears in the rings and not the balls.
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Old 01-03-2017, 07:27 PM   #14048
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kit diff balls are tungsten carbide, #97030.
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Old 01-03-2017, 07:37 PM   #14049
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kit diff balls are tungsten carbide, #97030.
By gosh your right!!
Who does that!
KYOSHO does...
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Old 01-03-2017, 07:56 PM   #14050
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lots of hidden goodies from "k". I think they started including them since RB5 series, it just no one taking attentions to them.
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Old 01-04-2017, 12:45 AM   #14051
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Ball diff for stupid high grip carpet or gear diff? Also I think I lost a a ball or two on the thrust washer( i think thats what it is called, the one on at the end of the shaft that goes through the center of the diff). should I replace them or will I be ok?

Also when I say stupid high grip carpet I mean if you are not careful running carpet tires you're going in to a wall if you touch the throttle too hard high grip.
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Old 01-04-2017, 01:01 AM   #14052
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Originally Posted by jcsfearless View Post
Ball diff for stupid high grip carpet or gear diff? Also I think I lost a a ball or two on the thrust washer( i think thats what it is called, the one on at the end of the shaft that goes through the center of the diff). should I replace them or will I be ok?

Also when I say stupid high grip carpet I mean if you are not careful running carpet tires you're going in to a wall if you touch the throttle too hard high grip.
i run high grip carpet, gear diff way to go imo
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Old 01-04-2017, 04:53 AM   #14053
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Quote:
Originally Posted by jcsfearless View Post
Ball diff for stupid high grip carpet or gear diff? Also I think I lost a a ball or two on the thrust washer( i think thats what it is called, the one on at the end of the shaft that goes through the center of the diff). should I replace them or will I be ok?

Also when I say stupid high grip carpet I mean if you are not careful running carpet tires you're going in to a wall if you touch the throttle too hard high grip.
How many thrust balls do u have. If u are one short the diff isn't going to work the way it's designed
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Old 01-05-2017, 03:47 AM   #14054
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Sorry, bit of a rookie question here. Recently purchased a 2nd hand one and it is mid motor. The rear suspension hangers are RF in the front and MM2 on the rear. Is this correct? Flicking through the manual It says to run RF2 when running mid motor.
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Old 01-05-2017, 04:12 AM   #14055
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Rf is rear front rr is rear rear
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