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R/C Tech Forums Thread 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 12-08-2012, 11:10 AM   #3226
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They'll settle as you run them.

It's the car at running weight? Everything installed?
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Old 12-08-2012, 11:20 AM   #3227
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I looked and didnt see a specific answer.

What from my RB5 SP2 spares is worth keeping to use with the RB6?
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Old 12-08-2012, 11:31 AM   #3228
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Quote:
Originally Posted by Ctimrun View Post
Sitting here getting my 6 all set up and with the gold rear springs and shock collars all the way up my ride height is way over 24 I want to run. Any ideas?
Wrong shock ends (too short) will push the spring cup too high... and therefor, the spring too high.. (or you aren't at running weight)
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Old 12-08-2012, 11:34 AM   #3229
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Originally Posted by Nexus View Post
I looked and didnt see a specific answer.

What from my RB5 SP2 spares is worth keeping to use with the RB6?
Gearbox gears
Diff
anything for the shocks
rear hubs
hing pins (I think)
motor guard
suspension hangers
axles and swingshafts
bearings
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Old 12-08-2012, 12:12 PM   #3230
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Originally Posted by Cpt.America View Post
Wrong shock ends (too short) will push the spring cup too high... and therefor, the spring too high.. (or you aren't at running weight)
I followed the Jason Dias setup. The distance between the ball end and the shock cartridge is 27.5mm, I've got the long ball ends on the rear shocks, and I'm at running weight. Odd
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Old 12-08-2012, 12:16 PM   #3231
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I followed the Jason Dias setup. The distance between the ball end and the shock cartridge is 27.5mm, I've got the long ball ends on the rear shocks, and I'm at running weight. Odd
27mm is the length of the showing shock shaft. is that how you measured it?
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Last edited by Cpt.America; 12-08-2012 at 12:31 PM.
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Old 12-08-2012, 12:22 PM   #3232
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well.. almost 27
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Kyosho Ultima RB6 & RB6.6 Car Thread-imag0310.jpg  
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Old 12-08-2012, 12:39 PM   #3233
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Originally Posted by Cpt.America View Post
no no.. 27mm is the length of the showing shock shaft. The distace between the TOP of the shock end, and the cartridge. I run 27mm exactly, with the long shock ends. Your overall length is about 20mm too short.

(i just read your post again.. maybe you are describing the same thing?)
Ya were saying the same thing. I am using a caliper to measure the distance between the top of the shock end and the cartridge and I have 27.5mm. I can't get the ride height below 30mm when it is setup like this, and this is with everything installed. I even threw on an extra shorty pack and the lowest I can get it is 28mm......

I also have to add that I had heard what great quality the Kyosho stuff is, and I have to agree, but their quality control as far as packing the kit (at least mine) was terrible.

I opened bag #5 to build the shocks and I had exactly 1 (yes one) O-ring to build all four shocks with. I had to drive for about three hours all over So-Cal to track down all the proper O-rings to get them built. When I got home I realized their little plastic shock cartridge tightening tool was also missing. I went through every bag, dug through my entire build trash can, took everything off my hobby room floor just in case I dropped it and it mysteriously rolled (even though its not round) and it never turned up.

Needless to say I am not thrilled about how this kit has gone together, I hope I have a better experience driving it than building it.
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Old 12-08-2012, 12:41 PM   #3234
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lets see some pictures of the car... sounds like something is a miss. Did you buy truck springs instead of Buggy springs? Lets measure the length of the unloaded spring.

EDIT. Springs are 73mm
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Old 12-08-2012, 02:48 PM   #3235
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Quote:
Originally Posted by fastestwon View Post
only if you don't know how to setup the car . my car works great in all conditions . here is my car on a low to med grip indoor clay track . my car is TQ in MM in the second spot is another RB6 in RM and in the fifth spot is an RB6 in MM as well the rest of the cars are AE and one TLR 22 in seventh spot . since i switched to MM the car has only gotten better. everyone has their own preference . good luck in however you decide to go .

http://www.youtube.com/watch?v=ZnT4owyK6Z0
I wish my track was like your 'low to med' grip. You'd consider mine ice...
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Old 12-08-2012, 02:49 PM   #3236
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hey guys just ran my new rb6 for the first time lastnight!! i love it, im wondering what pistons you guys are running i got the stock pistions and pinkf 35f goldr 30r on the oils and it just seems soft
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Old 12-08-2012, 02:50 PM   #3237
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unlikely but....
did you bleed your shocks completely ?
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Old 12-08-2012, 02:57 PM   #3238
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yes i bled them completly
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Old 12-08-2012, 04:51 PM   #3239
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Originally Posted by pete48 View Post
Is anyone running a full size stick pack in the mid-motor config? I just don't see how the battery is held in place on the motor side. The instructions only show to install the front battery mount. Seems as if this thing is going to slide all over the place.
ANYONE??????? My battery slides back and forth . The instructions show no provisions to hold it for/aft. Running stick pack and MM. Thanks!
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Old 12-08-2012, 05:00 PM   #3240
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use the included foam to tighten up the gap.
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