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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 10-19-2012, 11:20 AM   #1816
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How good are the JConcept wheels? Does anyone use them or is everyone using the KYO wheels?
The KYO wheels look the best, and stay clean the best. No reason to run anything else!
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Old 10-19-2012, 11:20 AM   #1817
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How good are the JConcept wheels? Does anyone use them or is everyone using the KYO wheels?
i find i better feel with the KYO wheels.. idk why
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Old 10-19-2012, 11:27 AM   #1818
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I tried the J Concepts wheels on my rb5 and hated them. They get real dirty , very fast. They also dont fit too good. There is only 2-3 threads to screw onto and it wobbles more. Dont get them Keith.
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Old 10-19-2012, 11:29 AM   #1819
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i think someone on here mentioned them before but has anyone tried the AKA wheels?
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Old 10-19-2012, 11:36 AM   #1820
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I'll trade you my B4 plus tons of spares and tires whenever you're ready.
Is the AE slop included? Lol
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Old 10-19-2012, 11:38 AM   #1821
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I'll throw in a box full of shims.
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Old 10-19-2012, 11:51 AM   #1822
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Haha you're funny Lamar!
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Old 10-19-2012, 12:04 PM   #1823
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I need some advice on selecting the right tire compound. I'm getting ready to run my RB6 for the first time tomorrow on a indoor clay track. This will also be my first time ever running 2wd buggy. MOD is all they run here so I need all the help that I can get. I currently have Tebo's Nats setup on my car but will make the necessary changes to get the car working throughout the day.

I have a good understanding of setup changes that'll increase/decrease mechanical grip from running onroad TC. However, I lack experience with running different tire compounds to achieve grip balance/bias. I read a post a couple of pages back mentioning that a softer compound (more grip) in the front vs. the rear will induce a push. I'm having a hard time grasping this and would appreciate it if someone can elaborate and/or clarify.

Before reading that post, my initial game plan for race day was:

1) if the traction level is low at the beginning of the day I would run a harder compound up front and a softer compound in the rear. Changes to chassis setup would be made to favor a slighly pushy car with a planted rear end.

2) as traction comes up I would dial more steering back into the car based on the cars behavior at corner entry/mid/exit. I would start going softer compound up front at this point.

3) for the Mains when the traction is (hopefully) at it's hightest, front tires would be softer compound than the rear tires.

Tires will be cleaned between rounds/runs. If the local fast guys are saucing tires, I'll get with a saucing program. Again, I'm new to 2wd buggy so my plan could be completely off. I'll be going to a brand new track with a brand new car all by myself so any help would be greatly appreciated.
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Old 10-19-2012, 12:18 PM   #1824
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when it comes to getting your car set up for offroad, i'd recommend tuning and practicing without saucing tires, you'll here guys talk about traction fading at the end of a run/main.. that is why. they've set up with the traction additive.

as far as tire compounds, i haven't gotten too deep into that, i race indoors and the track doesn't change a whole bunch throughout the day. i have ran harder compounds out back to reduce the tire biting and slowing cornering speed.. actually increased lap times.
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Old 10-19-2012, 12:31 PM   #1825
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Quote:
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I need some advice on selecting the right tire compound.
This really needs to be asked at your local track. Each track will usually have ONE tire that works best. Typically on indoor clay, guys run Jconcepts Barcodes, in Gold. But you would really need to check with your track.

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Originally Posted by John.C View Post
I currently have Tebo's Nats setup on my car but will make the necessary changes to get the car working throughout the day.
I don't think his setup is a good place to start, personally, as he was running at the super nats, on a fresh WCRC layout with very very low traction, and he was still experimenting with setups.
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Old 10-19-2012, 12:41 PM   #1826
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just out of curiosity, what would you recommend, the Jap set up is almost opposite of other indoor setups like Dias'...

my conditions are similar to Jason's and his set up isn't too too far off of Tebo's.

I've been searching for my own and its good, but always open to improvement
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Old 10-19-2012, 12:55 PM   #1827
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I'm running Tebo's Nats setup, everthing on it including the RB5 rear arms and front axles. Track is indoor clay, med-high bite, and the car is amazing.
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Old 10-19-2012, 12:57 PM   #1828
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I'll be running JC Bar Codes up front and Sweep 10Droids (similar to Bar Codes) in the rear. I have a pile of freshly mounted tires in various compounds with different inserts for both the front and rear. I was hoping that someone could explain how running differnt tire compound combination affects handling characteristic. I knew what I was getting into and I'm prepared to buy and test different tires. That being said, I would like to get the theory/principles right in my head. Is everyone running the same compound front and rear? For some reason I thought people ran different compounds.
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Old 10-19-2012, 01:09 PM   #1829
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I'll be running JC Bar Codes up front and Sweep 10Droids (similar to Bar Codes) in the rear. I have a pile of freshly mounted tires in various compounds with different inserts for both the front and rear. I was hoping that someone could explain how running differnt tire compound combination affects handling characteristic. I knew what I was getting into and I'm prepared to buy and test different tires. That being said, I would like to get the theory/principles right in my head. Is everyone running the same compound front and rear? For some reason I thought people ran different compounds.
I don't know anybody that does that, really. Most guys here run gold bar codes front and back on our indoor clay tracks. Some guys will run suburbs front and back, but still in the clay compound. Again, it depends on your track.
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Old 10-19-2012, 03:16 PM   #1830
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How to order from rc champ japan? I created account added stuff to cart, shipping address and I cannot move fwd. Anyone ordered from them in the states with paypal?
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