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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 11-21-2012, 11:43 AM
  #2746  
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Originally Posted by desertracerdad
Team tidbit... Buy the Carbon Composite gearbox (UMW504C). They are manufactured with more carbon/glass (to be stiffer), there is less shrink and the tolerances are better which allow the tranny & gears to run smoother.
With the new wing mounts on the 6 going through the tranny case I don't recall seeing this on this particular case. So my question is how are you making this work?
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Old 11-21-2012, 11:48 AM
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Originally Posted by goin2drt
I have blue accessories.

Thats two of us lol! I grabbed the shocktower and will wait for the rest of the blk parts to come in.
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Old 11-21-2012, 12:19 PM
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Originally Posted by Cpt.America
I had no idea the new AE pistons were two hole pistons... What sized holes? they must be 54s or 53s!
Their box setup is 1.6mm 2 hole 35f, 30r I believe. Drill size is about a #52.
Last edited by Yeti AS3; 11-21-2012 at 12:29 PM.
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Old 11-21-2012, 12:27 PM
  #2749  
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Originally Posted by Yeti AS3
Their box setup is 1.6mm 2 hole 35f, 30r I believe. Drill size is almost a #52.
hhm.. i can't imagine they would be generating any pack with that setup at all.
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Old 11-21-2012, 01:14 PM
  #2750  
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I mainly run my 6 mid motor and on carpet with big jumps but can't wait to try it on dirt/rear motor.
I tried Ghea pistons and loved them but so far 2x1.4/3x1.3 was mainly for smooth tracks with hard landings, I wouldn't use that much pack on bumpy tracks, more something like 4 holes.
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Old 11-21-2012, 01:43 PM
  #2751  
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Originally Posted by Cpt.America
hhm.. i can't imagine they would be generating any pack with that setup at all.
It's not all about "pack". The ae guys took their time with the big bores and did them right. U don't see anyone gluing holes shut like tebo did when the bb's came out for the rb5. There is a little room for improvement.
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Old 11-21-2012, 01:46 PM
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Originally Posted by Kraig
With the new wing mounts on the 6 going through the tranny case I don't recall seeing this on this particular case. So my question is how are you making this work?
The new UMW 504C gearbox does have the wing mount screw hole molded into it. The older UMW 504B gear cases we used on RB5/RT5 do not...
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Old 11-21-2012, 01:51 PM
  #2753  
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Originally Posted by cnelson3
It's not all about "pack". The ae guys took their time with the big bores and did them right. U don't see anyone gluing holes shut like tebo did when the bb's came out for the rb5. There is a little room for improvement.
So what other factors do you have when you compare or change number of holes, size of holes, and oil weight? You have static damping, (slow movement) and pack (fast movement). What else is there?
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Old 11-21-2012, 02:19 PM
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Originally Posted by jpcopeland1
I will be there tomorrow as well. Want to go the 4 hole 1.3mm route.
Originally Posted by aloksatoor
Go for it (By it I mean the excellent ghea pistons for the k cars absolute has them with 2 buck shipping). Found it awesome vs the stocks for handling and the cars super reactive as well but pillowy on the rougher stuff. I run pink/gold with 425/375. This was for a 60 plus day though, will go lighter in the winter arena when its colder a month from now.
Did a little testing yesterday with the Ghea pistons 4x1.3 ended up running the tapper down towards bottom of shock little more pack with faster rebound than with the tapper up or a flat Losi piston... Worked really good especialy for mod!! Ended up with losi 32.5wt up front 25wt in the rear white fronts reds rear....
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Old 11-21-2012, 02:36 PM
  #2755  
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Originally Posted by JPKinsella
Did a little testing yesterday with the Ghea pistons 4x1.3 ended up running the tapper down towards bottom of shock little more pack with faster rebound than with the tapper up or a flat Losi piston... Worked really good especialy for mod!! Ended up with losi 32.5wt up front 25wt in the rear white fronts reds rear....
Think I ran mine taper down as well, oils pretty close as well I went a bit higher in the rear though. Car is pillowy and on rails . Full pack testing this weekend hopefully if the weather holds! Can't wait to get a full prac day in with the car only raced two days still
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Old 11-21-2012, 04:31 PM
  #2756  
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Originally Posted by Cpt.America
I had no idea the new AE pistons were two hole pistons... What sized holes? they must be 54s or 53s!
the ae pistons are 1.5, 1.6 1.7 all 2 hole.
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Old 11-21-2012, 05:02 PM
  #2757  
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Originally Posted by micrors4guy
the ae pistons are 1.5, 1.6 1.7 all 2 hole.
1.3 would be closest to 55's, but it's NOT that size.
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Old 11-21-2012, 05:17 PM
  #2758  
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Originally Posted by JPKinsella
Did a little testing yesterday with the Ghea pistons 4x1.3 ended up running the tapper down towards bottom of shock little more pack with faster rebound than with the tapper up or a flat Losi piston... Worked really good especialy for mod!! Ended up with losi 32.5wt up front 25wt in the rear white fronts reds rear....
Where do they sell these? Is the whole piston tapered or just the wholes?
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Old 11-22-2012, 11:19 AM
  #2759  
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Happy Thanksgiving to all my fellow members of the Red Army!
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Old 11-22-2012, 11:39 AM
  #2760  
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Thanks Brandon! You too!
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