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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 12-28-2013, 03:25 PM
  #9166  
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Originally Posted by Speedychris22
I need help with gearing, for my mid motor setup I want to out a 9.5t motor. What do u guys suggest I should run?
22/76
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Old 12-28-2013, 03:28 PM
  #9167  
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Originally Posted by glenng
no i get that strange noise w gear diff too. avid slipper and it still makes that noise too. so not really sure what it is
Your tires might be hitting the wing.
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Old 12-28-2013, 03:40 PM
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Is the noise only on acceleration? Or does it happen when landing jumps? It could be the wing rubbing the tiers..?.
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Old 12-28-2013, 07:51 PM
  #9169  
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Got my new RB6 body!

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Old 12-28-2013, 09:11 PM
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Originally Posted by jamesbernatchez
Got my new RB6 body!

Sick paint. I really like what u did w the red white and blue
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Old 12-28-2013, 09:16 PM
  #9171  
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Originally Posted by ryanpatrickgore
Is the noise only on acceleration? Or does it happen when landing jumps? It could be the wing rubbing the tiers..?.
No its not that. I know exactly what the dude who first posted it meant. When u are stand still and hit the throttle it makes a quick not so loud "cuck cuck" sound. U gotta be standing right in front of car to hear it. Its not a big deal by any means, but i noticed it too. Usually when the pack is fresh and motor is laying down torque to the drive train.
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Old 12-28-2013, 10:28 PM
  #9172  
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Originally Posted by glenng
No its not that. I know exactly what the dude who first posted it meant. When u are stand still and hit the throttle it makes a quick not so loud "cuck cuck" sound. U gotta be standing right in front of car to hear it. Its not a big deal by any means, but i noticed it too. Usually when the pack is fresh and motor is laying down torque to the drive train.
Does the car stutter when it makes the noise?
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Old 12-28-2013, 10:34 PM
  #9173  
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Plug your sensor wire in....
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Old 12-28-2013, 10:52 PM
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Originally Posted by glenng
Sick paint. I really like what u did w the red white and blue

Thanks. The local guy really does awesome work! It isn't red, more of a fluorescent orange.

Here's another shot of it.

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Old 12-28-2013, 11:06 PM
  #9175  
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Double post
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Old 12-29-2013, 05:58 AM
  #9176  
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Thanks - its good to here that the noise not only at me so maybe not a very abnormal thing - I will put the 8,5T next weekend we will se how it turns out.
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Old 12-29-2013, 09:56 AM
  #9177  
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http://jtprc.com/2013/12/29/setup-tip-roll-center/

Razarthorn is that you :P
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Old 12-29-2013, 10:30 AM
  #9178  
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i think he got the last two mixed up...

a lower roll center - rolls more
higher roll center - rolls less
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Old 12-29-2013, 09:09 PM
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Ok fellers here's what I have been running since the chassis addition. I ran it this last Saturday and was able to run my personal bests in Round 1, then beating that by 4 seconds in Round 2. In the main I ran my fastest lap and had a lap on everyone, with some good competition. The new chassis makes the car easier to drive for sure in my opinion. I run on an indoor track that isn't really clay, its mainly hard packed dirt. Needless to say it can get dusty and loose at times so traction is up and down.

I put the new chassis on, went back to a setup I had run before, and did some battery adjustments that the new chassis allows you to do. My car weighs 1545g, and on the old chassis it was around 1580g. Pretty nice difference and it flexes more!

https://www.dropbox.com/s/1fnhs8sq6f...Dec%202013.pdf

Last edited by K_King; 12-31-2013 at 11:56 PM.
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Old 12-29-2013, 10:27 PM
  #9180  
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I have all my flex tune screws in the chassis, i will try taking out the middle 4 and see how it feels tomorrow
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