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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 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 12-25-2014, 06:38 PM
  #11371  
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What size pinion should I be running with a 10.5 T motor and 75t spur?
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Old 12-25-2014, 06:48 PM
  #11372  
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Originally Posted by Speedychris22
What size pinion should I be running with a 10.5 T motor and 75t spur?
I run a 23 with a 76 spur and it comes off at 40 degrees C. Not sure what that's in F, but it's classed as reasonably cool.
So with a 75t spur give 23 a try, but temp it after 3 mins.
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Old 12-26-2014, 10:41 AM
  #11373  
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Anybody running the Avid Springs? I was thinking about buying the package deal for both front and rear but a lot of times you end up paying for Springs that are either way to stiff or soft.
http://www.amain.com/avid-rc-12mm-ba...-set-4/p241347
http://www.amain.com/avid-rc-12mm-ba...-set-3/p241348
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Old 12-28-2014, 08:32 AM
  #11374  
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Hey guys... at a race and bent a rear shock shaft. The shop doesn't carry kyosho parts... are there any other shafts that will work on the rb6?
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Old 12-28-2014, 09:11 PM
  #11375  
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Originally Posted by rpboggs1
Hey guys... at a race and bent a rear shock shaft. The shop doesn't carry kyosho parts... are there any other shafts that will work on the rb6?
Losi for sure will not its 3.5mm thick. AE might work in a pinch, I would replace both rears to be symmetric.
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Old 12-28-2014, 11:49 PM
  #11376  
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Originally Posted by RichD
On Kevin Kings set-up it says the steering rack is reversed, but he's using a Shelle Racing rack. I too have the Shelle rack, but I can't see how you can reverse it, due to the nut holders?

Any help is greatly appreciated.

Cheers
Hi Guys,
Any help with this would be great.
Cheers
Rich
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Old 12-29-2014, 06:19 AM
  #11377  
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Originally Posted by aloksatoor
Losi for sure will not its 3.5mm thick. AE might work in a pinch, I would replace both rears to be symmetric.
Thanks for the reply. The AE one didn't work either... It's 3.06mm thick. Probably could have made it work by reaming out the o-ring spacer but I ended up bending the original shaft back and crossed my fingers. New Kyosho shafts are on the way... Along with some spares. Oddly enough another RB6 bent his rear shaft yesterday too. Wasn't the cars fault. Can't speak for the other guy but I got hung up sideways on a pipe... another car overshot the jump and did a nose dive between my tire and wing landing directly on the shock.
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Old 12-29-2014, 06:48 AM
  #11378  
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Originally Posted by RichD
Hi Guys,
Any help with this would be great.
Cheers
Rich
The Schelle rack is made with the reverse built in. So a reversed Kyosho rack is the same as the Schelle rack with no shims.
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Old 12-29-2014, 01:07 PM
  #11379  
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Originally Posted by K_King
The Schelle rack is made with the reverse built in. So a reversed Kyosho rack is the same as the Schelle rack with no shims.
Thanks. And using the outside holes tames the steering more?
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Old 12-29-2014, 01:11 PM
  #11380  
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Originally Posted by RichD
Thanks. And using the outside holes tames the steering more?
Yup. You'll get less mid corner and exit steering.
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Old 12-29-2014, 01:23 PM
  #11381  
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Originally Posted by K_King
Yup. You'll get less mid corner and exit steering.
Thanks
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Old 12-29-2014, 05:43 PM
  #11382  
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I'm using the Zack Rogers setup but have the older style MMR suspension hangers. I have both the wide and narrow versions (from Exotek) but which do you guys recommend?
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Old 12-29-2014, 06:17 PM
  #11383  
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i have bent the reears as well so i just carry a spare set of full shocks. oddly mine also bend at relaviely soft hits. this in mm rm i never had a problem.
Originally Posted by rpboggs1
Thanks for the reply. The AE one didn't work either... It's 3.06mm thick. Probably could have made it work by reaming out the o-ring spacer but I ended up bending the original shaft back and crossed my fingers. New Kyosho shafts are on the way... Along with some spares. Oddly enough another RB6 bent his rear shaft yesterday too. Wasn't the cars fault. Can't speak for the other guy but I got hung up sideways on a pipe... another car overshot the jump and did a nose dive between my tire and wing landing directly on the shock.
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Old 12-29-2014, 06:21 PM
  #11384  
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Originally Posted by rpboggs1
I'm using the Zack Rogers setup but have the older style MMR suspension hangers. I have both the wide and narrow versions (from Exotek) but which do you guys recommend?
Go narrow
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Old 12-29-2014, 07:58 PM
  #11385  
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So what's the more popular choice for speedo placement in a mid motor? Speedo in front of the battery with battery all the back or speedo in back of battery with battery pushed foward?? Running the car on medium bite clay in mod.
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