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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 05-18-2014, 08:12 PM   #10426
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jwcobra03 maybe try 3.5 degree rear toe it may just give you what you need
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Old 05-19-2014, 02:32 AM   #10427
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So I just finished fitting all of the upgrade bits to my MM RB6; can't believe how much difference in weight between the stock arms and the carbon-composite arms! I actually thought the kit must have come with the carbon ones because I couldn't tell a difference visually but each pair of arms saves over 5 grams (good reduction in unsprung mass) and with the shock towers adds up to a total saving of over 15grams. Car is now sitting at 1465grams with no bits removed or any drilling etc done to lighten anything; and that's with a standard servo & standard 220g shorty (not these super light 160g ones I keep reading about. Just have to figure out where to add weight back in now to meet the 1499 requirement...
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Old 05-19-2014, 01:40 PM   #10428
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Quote:
Originally Posted by Zylux View Post
So I just finished fitting all of the upgrade bits to my MM RB6; can't believe how much difference in weight between the stock arms and the carbon-composite arms! I actually thought the kit must have come with the carbon ones because I couldn't tell a difference visually but each pair of arms saves over 5 grams (good reduction in unsprung mass) and with the shock towers adds up to a total saving of over 15grams. Car is now sitting at 1465grams with no bits removed or any drilling etc done to lighten anything; and that's with a standard servo & standard 220g shorty (not these super light 160g ones I keep reading about. Just have to figure out where to add weight back in now to meet the 1499 requirement...
Nice to know buddy. I might put back my full shorty after I get my hands on those. Might have to stock up, my LHS only carries the softer stock parts.
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Old 05-20-2014, 01:26 PM   #10429
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hello,is you can put satellites differential?

Balls do not work well, I like more of satellites.

a greeting
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Old 05-21-2014, 10:37 AM   #10430
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Quote:
Originally Posted by electrojer View Post
hello,is you can put satellites differential?

Balls do not work well, I like more of satellites.

a greeting
Yes. there is a gear differential available
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Old 05-22-2014, 10:15 PM   #10431
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http://www.schelleracing.com/kyosho-...g-rack-SCH1042

mines ordered . Remember when the buggy launched a couple years back, we all had a huge discussion on this topic lolz finally came to fruition.
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Old 05-22-2014, 10:27 PM   #10432
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Yaiba & Exotek make similar aftermarket alu racks too
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Old 05-22-2014, 10:45 PM   #10433
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Originally Posted by wyl03 View Post
Yaiba & Exotek make similar aftermarket alu racks too
Those slop out like crazy. No bearings they got king pins so it worse metal on metal grinding. This should be precise. I put the car with the kyosho aluminum rack on the hudy station and it's got 3 4 degrees slop on servo centered. This is after 8 or so race days on the rack.
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Old 05-23-2014, 02:40 AM   #10434
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I was involved in the development of this product, and it eliminates the slop from the rack. It also provides some additional adjustments, you can move the ballstuds out shortening the steering link lengths.

RB6 Ball Bearing Steering Rack Features:
1. Precision CNC machined and black anodized with laser etched Schelle logo.
2. Inboard “kit” location allows shifts steering pivots back 1mm for more Ackermann.
3. Wide pivot option shortens steering link for different bump-steer geometry which is more predictable as the chassis leans in cornering.
4. Steering pivots slop-free on 4 pcs 3x6mm flanged ball bearings.
5. Rack ballstuds anchor into black M3 aluminum nylon locking nuts.
6. Includes Steering Rack, M3 nuts, Bearings, Shims, and Instructions and Schelle mini decal.
7. Fits Kyosho RB6, RT6, SC6.
http://youtu.be/iY0HJOLmKiE
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Old 05-23-2014, 04:24 AM   #10435
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Quote:
Originally Posted by Jason.Dias View Post
I was involved in the development of this product, and it eliminates the slop from the rack. It also provides some additional adjustments, you can move the ballstuds out shortening the steering link lengths.

RB6 Ball Bearing Steering Rack Features:
1. Precision CNC machined and black anodized with laser etched Schelle logo.
2. Inboard “kit” location allows shifts steering pivots back 1mm for more Ackermann.
3. Wide pivot option shortens steering link for different bump-steer geometry which is more predictable as the chassis leans in cornering.
4. Steering pivots slop-free on 4 pcs 3x6mm flanged ball bearings.
5. Rack ballstuds anchor into black M3 aluminum nylon locking nuts.
6. Includes Steering Rack, M3 nuts, Bearings, Shims, and Instructions and Schelle mini decal.
7. Fits Kyosho RB6, RT6, SC6.
http://youtu.be/iY0HJOLmKiE
Good stuff! Will AMain carry it? Where can one order? Cheers,
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Old 05-23-2014, 04:25 AM   #10436
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Quote:
Originally Posted by aloksatoor View Post
Those slop out like crazy. No bearings they got king pins so it worse metal on metal grinding. This should be precise. I put the car with the kyosho aluminum rack on the hudy station and it's got 3 4 degrees slop on servo centered. This is after 8 or so race days on the rack.
Easy fix...stop using setup stations!
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Old 05-23-2014, 09:32 AM   #10437
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Quote:
Originally Posted by gelshocker View Post
Good stuff! Will AMain carry it? Where can one order? Cheers,
Got mine from schelle racings site. They take cards and PP of course. http://www.schelleracing.com/
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Old 05-23-2014, 09:32 AM   #10438
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Quote:
Originally Posted by nitroargi View Post
Easy fix...stop using setup stations!
haha hold your servo arm and jiggle the front hex :P
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Old 05-23-2014, 11:36 AM   #10439
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Quote:
Originally Posted by gelshocker View Post
Good stuff! Will AMain carry it? Where can one order? Cheers,
Yes, it will eventually be stocked at A-Main. Will ship with their next order.
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Old 05-24-2014, 12:38 AM   #10440
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i finished building my rb6 recently coming from nitro and i swear 2wd's take longer to build and are more complicated than anything 8 scale...

i had the slipper set as per the manual with the nut flush with shaft end and found it to be slipping very badly, i tightened the slipper incrementally and could only eliminate slip with the spring completely compressed.
is this normal?
also i am now doubting the ball diff set up as there seems to be a strange whinning noise when on throttle.

ive never had problems running multiple nitro's and electric 8th scales, but this thing has me scratching my head.
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