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Old 12-21-2016, 08:46 AM   -   Wikipost
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 04-28-2015, 11:23 PM   #11971
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what weight diff. fluid did you used in the gear diff?I just bought a 7.5 and wondering where to start with .3k 5k 7k?
If you read over a hundred pages u will find lots of your questions answered. 3k works great in gear diff.page 668 to 672.lol
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Old 04-29-2015, 09:32 PM   #11972
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How is everyone holding in there shortly sideways and will this give more grip outside.
I dremeled the chassis sides flush and cut the sideguards so the battery can lie flat on the chassis and fit underneath the hold down brace. Otherwise, people use double sided tape, tape around the battery and chassis, or shim up the hold down brace and shelf (if you aren't going to dremel the sides of the chassis). I've even seen someone cut slits in the sideguards and use velcro straps.

There are so many tuning options for this car that the old saying "There are many ways to skin a cat" rings true. I've found sideways gives me more rear traction at the expense of steering because the battery CoG is further rearward than inline. If you're willing to cut up your car, the sideways option offers more weight tuning options since you're able to move the battery more forward/rearward whereas inline is limited to a couple inches by the motor or servo.

Personally, the sideways option is more visually appealing IMHO. I think it looks cleaner and easier to access the electronics. I tried the inline, but couldn't make my electronics fit without it being a spaghetti wire mess that was aesthetically nauseating.
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Last edited by Jpdanger; 04-29-2015 at 09:53 PM.
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Old 04-30-2015, 02:53 AM   #11973
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I ended up just throwing a square pack in it it's pretty good on a blown out track little sluggish but easy to drive Car weighed 1674 with smc square and alum steering and hanger and brass front hanger . I think I'm going to take off the brass.
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Old 05-01-2015, 08:29 AM   #11974
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I ended up just throwing a square pack in it it's pretty good on a blown out track little sluggish but easy to drive Car weighed 1674 with smc square and alum steering and hanger and brass front hanger . I think I'm going to take off the brass.
I just recently stuck a saddle pack back in my car as well. It's just easier to drive. It's hard for me to say it "feels" heavy because I went up in spring rates and it's almost as nimble as before it was at 1580. I'm at 1640 now. I'm still working on the setup but so far so good. Rear grip goes way up once you add the weight.
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Old 05-02-2015, 10:11 PM   #11975
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I tried the gear diff today, all machined internals, with the new cover. Felt really good tonight, didnt seem to drive any differently except it felt like it had more forward drive. Low speed felt fine and the high speed was pretty smooth as well.
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Old 05-02-2015, 10:15 PM   #11976
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I tried the gear diff today, all machined internals, with the new cover. Felt really good tonight, didnt seem to drive any differently except it felt like it had more forward drive. Low speed felt fine and the high speed was pretty smooth as well.
What fluid?
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Old 05-02-2015, 11:11 PM   #11977
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Tried 3k. I want to try 4 and 5 also.
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Old 05-03-2015, 11:22 AM   #11978
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I just recently stuck a saddle pack back in my car as well. It's just easier to drive. It's hard for me to say it "feels" heavy because I went up in spring rates and it's almost as nimble as before it was at 1580. I'm at 1640 now. I'm still working on the setup but so far so good. Rear grip goes way up once you add the weight.
What spring and oil. Where u at. And where u now
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Old 05-03-2015, 04:25 PM   #11979
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What spring and oil. Where u at. And where u now
Ashley,
What track?
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Old 05-04-2015, 04:52 PM   #11980
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Default tebo ocrc reedy 15 setup ?

(Rear arm hole drilled narrow 17.5 from sway bar.) Is this for shock mounting hole ?
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Old 05-04-2015, 07:26 PM   #11981
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What spring and oil. Where u at. And where u now
white fronts and gold rears. I tried golds fronts as well but it was a little too much. 32.5 front and 30 rear. So far so good but right this moment, I'm running a sway bar set up that feels awesome. same weight without the saddle packs but switched to white rears and the pink sway bar. same oil as well.
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Old 05-04-2015, 07:28 PM   #11982
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Ashley,
What track?
Trackside in Milwaukee
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Old 05-05-2015, 05:05 PM   #11983
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Anyone 3d print a battery tray for mounting the shorty sideways? I have a sketch but do not want to reinvent the wheel if its not needed.
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Old 05-08-2015, 08:32 PM   #11984
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ive read about the third hole being 17.5mm from where? anybody post a picture of what it looks like?
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Old 05-08-2015, 10:00 PM   #11985
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ive read about the third hole being 17.5mm from where? anybody post a picture of what it looks like?
From the sway bar hole. Kyosho sells an updated arm with the hole pre drilled. It's part number 713b.
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