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Kyosho Ultima RB6 & RB6.6 Car Thread

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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 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 06-23-2013, 11:21 AM
  #7366  
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My stock car comes in at 1517g. I'm sure I can shave a few more off with some ti goodies and the avid top shaft/ triad slipper. Stock class is a different animal.
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Old 06-23-2013, 08:45 PM
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Just want to share: the bulldog is one ugly SOB, it ripped at the back on its first outing, but my word it tracks like a gyroscope. The incompetence of the driver is there for all to see
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Old 06-24-2013, 11:10 AM
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So for us people who just got an RB-6, how much anti squat does the car have when there is no shim under rear block? then how much do you add/subtract when you change by 0.5?

Also, has anyone tried raising the transmission?
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Old 06-24-2013, 11:21 AM
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Originally Posted by Jam-Air View Post
So for us people who just got an RB-6, how much anti squat does the car have when there is no shim under rear block? then how much do you add/subtract when you change by 0.5?

Also, has anyone tried raising the transmission?
2* no shims.

reduce antisquat by adding shims under the RR block.
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Old 06-24-2013, 11:30 AM
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Originally Posted by skengines View Post
2* no shims.

reduce antisquat by adding shims under the RR block.
Thanks SK, so if there is a 0.5 shim back there, most likely it has 1 degree then and if you add a 1.0 mm shin its 0, correct?
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Old 06-24-2013, 11:51 AM
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Originally Posted by Jam-Air View Post
I have a set of V2 hubs on my car, ran them yesterday at top notch race. Only difference is press in plastic inserts for different bearing sizes

The new hangers are what is adjustable

In regards to buggy weight, I saw a 1680 gram buggy run a second a lap faster than everyone else in money stock
This buggy is a lot planted and easier to drive when heavy. I tried shorty pack and for me it's unpredictable to drive and it's get easily upset when you hit a bump so I switch to full size lipo and it's night and day.
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Old 06-24-2013, 12:12 PM
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Originally Posted by Jam-Air View Post
Thanks SK, so if there is a 0.5 shim back there, most likely it has 1 degree then and if you add a 1.0 mm shin its 0, correct?
0.5mm shim = +\- 1*
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Old 06-24-2013, 01:45 PM
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Default narrow hanger mid motor

Does anyone know if you can run mid motor with the narrow hangers? If so do you use the same hanger as rear motor or a different one?
Thanks in advance!
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Old 06-24-2013, 05:44 PM
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Sooo, does anybody know if the MIP top shaft will fit the RB6?
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Old 06-24-2013, 05:59 PM
  #7375  
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Originally Posted by Team G Racing View Post
Sooo, does anybody know if the MIP top shaft will fit the RB6?
Buy one and try it? You could probably just compare them at the hobby shop in their respective packaging.
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Old 06-24-2013, 06:06 PM
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I checked on Amain and compared the Avid RB6 and the MIP and it looks a little different. I will wait til MIP answers
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Old 06-24-2013, 06:25 PM
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My rb6 has a stupid amount of initial turn in. Is there anything I can do to lessen it? I am running a mid motor on carpet.

Also for some resason my car just wants to throw a whip off of the biggest jump on the track. Not saying I don't like it cause it makes it look awesome! Just want to know why lol
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Old 06-24-2013, 06:58 PM
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Rebuild your shocks Jake, it will stop the whip off the jump. You can use other front tires that are less aggressive too. The block pass is really edgy.

I'm gonna run laps tomorrow if its not raining.
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Old 06-24-2013, 07:20 PM
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I already re did the shocks and I was using gold bar codes. Blake drove mine and he said to tighten the slipper more but otherwise it is just like his. He also said Jeff woods mm rb6 would do whips like mine.
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Old 06-24-2013, 07:26 PM
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Originally Posted by silveraider14 View Post
My rb6 has a stupid amount of initial turn in. Is there anything I can do to lessen it? I am running a mid motor on carpet.

Also for some resason my car just wants to throw a whip off of the biggest jump on the track. Not saying I don't like it cause it makes it look awesome! Just want to know why lol
Try a little toe-out in the front, and maybe try more caster. 25 caster will make initial and low speed steering really aggressive. 30 will feel more tame in the infield.
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