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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 01-15-2013, 10:41 PM   #4336
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Why so many rb5 parts being referred to? You guys trying to make a rb5.5?
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Old 01-16-2013, 04:59 AM   #4337
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Ran the new Avid 4 hole pistons with Losi 27.5f & 25r last night. Liked it much better the the stock pistons, Seemed more planted and jumped much much better.
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Old 01-16-2013, 05:45 AM   #4338
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Quote:
Originally Posted by K_King View Post
Anyone go back to the stock pistons with like 30/25 weight?
I haven't gone that low but there are setups that do, check out petit rc
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Old 01-16-2013, 05:58 AM   #4339
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Quote:
Originally Posted by teeforb View Post
Why so many rb5 parts being referred to? You guys trying to make a rb5.5?
In stock form, the rb6 is almost perfect out of the box. For my particular setup and track I think the cars massive account of rear grip can hinder my aggressive/flat-out driving style. I like to carry alot of corner speed, and take clean lines. The car grips too well and I need just a tad less side grip.

I'm going to tune a little more on the six arms today to see if I can find a happy medium, however I'll try the 5 arms saturday regardless just see how it affects the car as a tuning option.
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Old 01-16-2013, 06:08 AM   #4340
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Quote:
Originally Posted by t8rtot
In stock form, the rb6 is almost perfect out of the box. For my particular setup and track I think the cars massive account of rear grip can hinder my aggressive/flat-out driving style. I like to carry alot of corner speed, and take clean lines. The car grips too well and I need just a tad less side grip.

I'm going to tune a little more on the six arms today to see if I can find a happy medium, however I'll try the 5 arms saturday regardless just see how it affects the car as a tuning option.
Are you using the wide or narrow rear suspension mounts?


Quote:
Originally Posted by K_King
Anyone go back to the stock pistons with like 30/25 weight?
What kind of surface are you running on?


I've got the itch to try something new. If I can make it to the track this week, I'll probably pick up a 6.
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Old 01-16-2013, 06:46 AM   #4341
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Originally Posted by Ctimrun View Post
I thought I would try to get the 6 a little lighter for stock buggy and I got down below 1499. I actually got it down in the 1480's but didn't drive it that way since I believe too light is not good for a number of reasons (not legal being one). I was in a hurry to get to the track before it got too busy so I quickly added some weight up front with the low profile servo to try to get it to 1499 for a starting point. This buggy was at 1595 when I first built/drove/weighed it and being down at 1497 makes a huge difference with how quick it is both bottom and top end speed. Didn't get to drive it much but it is FAST! Being able to add weight where/when needed will be nice. The point of all this...... for the RB6 haters, it can be very light with a little effort.....

WTH? How did you get it that low? I did everything I could and still am at 1529. Slipper eliminator, no gear cover, small bore shocks, low pro servo, titanium everything. Lets see a pic without the body on.
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Old 01-16-2013, 07:43 AM   #4342
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Quote:
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Are you using the wide or narrow rear suspension mounts?
I've done both.

You've been debating for awhile, DO IT.
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Old 01-16-2013, 07:55 AM   #4343
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Quote:
Originally Posted by t8rtot View Post
In stock form, the rb6 is almost perfect out of the box. For my particular setup and track I think the cars massive account of rear grip can hinder my aggressive/flat-out driving style. I like to carry alot of corner speed, and take clean lines. The car grips too well and I need just a tad less side grip.

I'm going to tune a little more on the six arms today to see if I can find a happy medium, however I'll try the 5 arms saturday regardless just see how it affects the car as a tuning option.
Does it have a lot steering with all the traction?
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Old 01-16-2013, 08:04 AM   #4344
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Just sucks that I've got so much invested in AE at the moment. Oh well, onward and upward. It's was a toss up between this and the Yokomo, but I can't even find a standard B-Max Worlds? model, just the stripped down MR.

There's a big race this weekend, maybe I'll run it there.
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Old 01-16-2013, 08:22 AM   #4345
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The car has ample steering with rear locked, it just didn't fit my driving style, the the guys that have driven my car say they wouldn't change a thing and I haven't until now. I'm just looking for a little more now I'm starting to feel comfortable with the car.

The MR is about as stripped down as the RB6 (steel tie rods and turnbuckles for example) but I wouldn't gave an issue, it's essentially what you'd get going kyosho..

I thought about the Yokomo but I just don't think I want to go back to plastic chassis I can't tune and non velvet shocks.
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Old 01-16-2013, 08:37 AM   #4346
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I wouldn't do it on a big race day though, it's gonna be still enough. It'll be way easier to take your anger out in the car then it would with your AE..

I would go with what you know, maybe just test the new car there if you have the extra electronics.
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Old 01-16-2013, 08:39 AM   #4347
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From what I've read, the MR has the lower end shocks, and gear diff. I can live with the shocks, but having to mail order everything and "upgrade" to a ball diff is damn near a deal breaker. There aren't even enough people running it to get a good feel for what breaks/wears prematurely and what doesn't.

The K car needs nothing. The shocks are the cream of the crop, the turnbuckles are indestructible, the ball diff is one of the best in the business, and I have local parts support.
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Old 01-16-2013, 08:46 AM   #4348
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Winner, sounds like all you need is for the cashier to ask you paper or plastic. Post pics when she's built
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Old 01-16-2013, 08:51 AM   #4349
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I take PayPal and offer paper or plastic for my spare rb6!!
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Old 01-16-2013, 08:52 AM   #4350
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Quote:
Originally Posted by t8rtot View Post
In stock form, the rb6 is almost perfect out of the box. For my particular setup and track I think the cars massive account of rear grip can hinder my aggressive/flat-out driving style. I like to carry alot of corner speed, and take clean lines. The car grips too well and I need just a tad less side grip.

I'm going to tune a little more on the six arms today to see if I can find a happy medium, however I'll try the 5 arms saturday regardless just see how it affects the car as a tuning option.
Nah, forget teh 5 amrs. If your rear end really is THAT planted, and you are looking for more corner speed, the first thing I would do is switch to 2.5 degrees of rear toe instead of 3. Will be money!
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