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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
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
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 02-23-2014, 06:29 PM
  #9946  
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I'm running 17.5 and i got rid of the on power push but in the mid corner it doesn't feel stable and pushes a little, I can't get it to stick to inside line unless I let off completely. I'd like to be able to acc sooner without pushing out.
I'm rear motor
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Old 02-23-2014, 06:36 PM
  #9947  
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Originally Posted by Mxer59
I'm running 17.5 and i got rid of the on power push but in the mid corner it doesn't feel stable and pushes a little, I can't get it to stick to inside line unless I let off completely. I'd like to be able to acc sooner without pushing out.
I'm rear motor
try adding some antisquat.
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Old 02-23-2014, 07:04 PM
  #9948  
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Originally Posted by MikeXray
try adding some antisquat.
The shims underneath the rear hinge pin holder
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Old 02-23-2014, 07:38 PM
  #9949  
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Originally Posted by Mxer59
The shims underneath the rear hinge pin holder
yes under rf or rf2.
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Old 02-23-2014, 07:40 PM
  #9950  
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Originally Posted by glenng
for anyone who has the mip pucks installed, how is the axle length? is it the same as the stock rb6, which makes it difficult w 3rd party rims? or did they lengthen the threads a bit? any chance the stock axles can work with the puck cvd so i can use the avid heavy duty axles with the puck system? thanks in advance!

glenn
The axles are longer and work well with all rims I have tried.
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Old 02-23-2014, 08:34 PM
  #9951  
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Originally Posted by MikeXray
yes under rf or rf2.
Alright may try that cause I run no shims as of now
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Old 02-23-2014, 09:54 PM
  #9952  
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Originally Posted by 1967rs
The axles are longer and work well with all rims I have tried.
great news! thanks 67rs! now if amains could restock that would be rad.

also noticed it has chrome steel balls. did you replace with tungsten? im thinking of tungsten for main diff and thrust, possible ceramic thrusts. any suggestions for the thrusts? thanks so much.
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Old 02-23-2014, 10:02 PM
  #9953  
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Originally Posted by glenng
great news! thanks 67rs! now if amains could restock that would be rad.

also noticed it has chrome steel balls. did you replace with tungsten? im thinking of tungsten for main diff and thrust, possible ceramic thrusts. any suggestions for the thrusts? thanks so much.
i run both ceramic on trust and diff, Avid stuffs..so far no complaints.
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Old 02-23-2014, 10:12 PM
  #9954  
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Originally Posted by Trident69
i run both ceramic on trust and diff, Avid stuffs..so far no complaints.
Thanks man. I'll get both for the thrusts and try ceramic first. Ran tungsten/ceramic thrusts in my durango and was super smooth
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Old 02-23-2014, 10:47 PM
  #9955  
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Originally Posted by glenng
Thanks man. I'll get both for the thrusts and try ceramic first. Ran tungsten/ceramic thrusts in my durango and was super smooth
seriously speaking..switch from tungsten to ceremic..not much diff..maybe more seasoned racers can tell the diff, for me, yes it is smoother..performance wise..i really cant tell the diff
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Old 02-24-2014, 03:22 AM
  #9956  
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Originally Posted by Gitsum
A dab of shoe goo between the brace n bumper is a better fix.
I"ll try this first, and if it still pops out I'll try glenn's solution.

I ordered the rb5 aluminum piece before I knew it was wider, so want to get the geometry back to stock so goin back to the b-block w/brace.
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Old 02-24-2014, 04:25 AM
  #9957  
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Anyone tried the JConcepts front brace? The Kyosho 'high-strength' front brace is not working for me.. Cheers,
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Old 02-24-2014, 04:36 AM
  #9958  
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Originally Posted by gelshocker
Anyone tried the JConcepts front brace? The Kyosho 'high-strength' front brace is not working for me.. Cheers,
i bent the exotek front brace on the first race. got tangled with another car. Wonder if a plastic piece would stay true better then aluminum. or even carbon fiber
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Old 02-24-2014, 06:24 AM
  #9959  
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Originally Posted by nickdawg18
i bent the exotek front brace on the first race. got tangled with another car. Wonder if a plastic piece would stay true better then aluminum. or even carbon fiber
And i think the bumper shoulda been beefier upfront, because that brace bears the brunt of my mishaps.
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Old 02-24-2014, 06:25 AM
  #9960  
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Here is my setup if anyone wants to try it. The car is super easy to drive and it jumps great.i liked the shorty servo the best but can use a full size servo if needed.
Attached Thumbnails Kyosho Ultima RB6 & RB6.6 Car Thread-image.jpg  
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