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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 03-05-2014, 08:13 AM
  #10021  
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Always improving, that's awesome! That makes 5 different RB6 chassis released out to the public. The battery stop is great for MM, although I glued a thin battery foam to move my battery forward.
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Old 03-05-2014, 12:54 PM
  #10022  
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Thats great to hear. Think they will also start including the nicer rt6 style esc shelf which can actually fit regular escs
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Old 03-05-2014, 01:02 PM
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Originally Posted by K_King View Post


You can see the differences here. It just looks like you have the RT6 style running change with the extra mounting holes.
whats the flex differance between the lightweight chassisand the first gen chassis. yeah i know there is a weight differance. but what about flex? the reason i ask this is because my chassis has a lot of flex in it and any more i would think it would bend pretty easy.
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Old 03-05-2014, 01:14 PM
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Well with the stock chassis the team is not using the screws in the side pods or the transmission brace in the chassis. So it would seem they are looking for more flex for the rear motor set-up. We will have to wait and see what the Cactus classic brings back for set-up changes from last year.
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Old 03-05-2014, 01:22 PM
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Originally Posted by Holmberg418 View Post
whats the flex differance between the lightweight chassisand the first gen chassis. yeah i know there is a weight differance. but what about flex? the reason i ask this is because my chassis has a lot of flex in it and any more i would think it would bend pretty easy.
The LW flexes quite a bit. There's a lot of milling there. I run the screws in the side but not for the motor brace.
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Old 03-05-2014, 04:05 PM
  #10026  
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...are you just leaving the two lower screws out or not running the motor brace at all?
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Old 03-05-2014, 04:09 PM
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Bottom 2 on the chassis
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Old 03-05-2014, 04:38 PM
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Ok who's running the kyosho gear diff. in this car with success? Have any tips or tricks you want to share?
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Old 03-05-2014, 08:40 PM
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Originally Posted by Holmberg418 View Post
whats the flex differance between the lightweight chassisand the first gen chassis. yeah i know there is a weight differance. but what about flex? the reason i ask this is because my chassis has a lot of flex in it and any more i would think it would bend pretty easy.
I'm running the 1st gen chassis and flat out got rid of the chassis brace. I put the first 2 screws in the side rails and it's been pretty good so far. there is definitely a lot of flex but it hasn't bent.
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Old 03-06-2014, 04:37 AM
  #10030  
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When u guys talk about the chassis brace, which part is that?
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Old 03-06-2014, 10:03 AM
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Originally Posted by Speedychris22 View Post
When u guys talk about the chassis brace, which part is that?
Nelson is talking about this one, UM723. I believe the same is true with the others.
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Old 03-06-2014, 10:07 AM
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Disregard!!!! Abort abort!

Last edited by Posvar; 03-06-2014 at 10:33 AM.
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Old 03-07-2014, 12:40 PM
  #10033  
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Still new to Kyosho. Can you tell me what size the stock pistons are? I know they are 5 hole for kit pistons. What are they equivalent to in a 2 and 3 hole piston?
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Old 03-07-2014, 01:43 PM
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So what is the consensus on the new light weight chassis? Is it better for mm? or no real difference?
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Old 03-07-2014, 01:58 PM
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I really like the LW chassis. I have all the steering I need but with more rear grip.
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