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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 03-12-2015, 02:54 PM   #11776
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Quote:
Originally Posted by K_King View Post
Yup. 18mm from the sway hole I believe.
Is there a pic that shows the new arms? Did they do 18 and 17.5mm?
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Old 03-12-2015, 03:46 PM   #11777
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From my understanding they made the new hole on the 2 hole side to be 18mm and on the 1 hole side the new inside hole will be basically the half distance of the other side.
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Old 03-12-2015, 04:40 PM   #11778
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Originally Posted by K_King View Post
From my understanding they made the new hole on the 2 hole side to be 18mm and on the 1 hole side the new inside hole will be basically the half distance of the other side.
I do see a revision of the rear arms coming out this month, maybe they will have the hole drilled already

Edit just read the other post.
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Old 03-13-2015, 09:06 AM   #11779
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Quote:
Originally Posted by K_King View Post
From my understanding they made the new hole on the 2 hole side to be 18mm and on the 1 hole side the new inside hole will be basically the half distance of the other side.
The hole between the 18 is what I have been running along with the brass toe block. I'm excited for these to come out.
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Old 03-13-2015, 09:17 AM   #11780
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The inside hole on the current arm is what you run? It's not bad either. I will go out there sometimes.

Basically it will be like this.
2-4
1-3-5


4 and 5 will be the new hole. 4 will be a nice option to try also.
But once the arms come out we can measure the actual distance of hole 5.
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Old 03-13-2015, 11:05 AM   #11781
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Quote:
Originally Posted by K_King View Post
The inside hole on the current arm is what you run? It's not bad either. I will go out there sometimes.

Basically it will be like this.
2-4
1-3-5


4 and 5 will be the new hole. 4 will be a nice option to try also.
But once the arms come out we can measure the actual distance of hole 5.
Actually 20mm from the sway bar hole. I'm guessing it will be the hole next to the old 2 hole considering I could only drill the "20" hole on that side. It supports the back of the car better and you don't loose steering. Lands a little better (in my opinion) and you don't sacrifice much rear grip. To me at least, it's a much more balanced car.
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Old 03-13-2015, 12:36 PM   #11782
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Well whatever the distance it's cool to see such a large company listen the "people".
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Old 03-13-2015, 01:53 PM   #11783
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Sumo Racing now do a Graphite Battery Brace w/hold down.

eBay - Sumo Racing RB6 Battery Brace.

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Old 03-14-2015, 08:50 AM   #11784
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Just got an email saying the arms are in stock at Kyosho America.
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Old 03-14-2015, 05:31 PM   #11785
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I have plenty of 1.6 AE pistons ....anybody running the associated pistons? Any issues?
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Old 03-14-2015, 09:48 PM   #11786
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Quote:
Originally Posted by dan-o View Post
I have plenty of 1.6 AE pistons ....anybody running the associated pistons? Any issues?
A lot of the guys at my track including myself will run the AE piston to mess with set up but then buy the Kyosho pistons once you figure it out. The only "issue"'is the AE pistons aren't as thick so you'll get a little click in your shock as it goes up and down. If you just leave you are getting a tiny bit of free play before the piston starts working. I would imagine only the top top racers could really notice while driving. Some guys have thrown axle shims between the piston and E clip and it takes care of the problem.
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Old 03-15-2015, 04:44 AM   #11787
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Thank you!
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Old 03-17-2015, 09:45 AM   #11788
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what blank pistons do you guys use to build your own?

thanks!

Paul
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Old 03-17-2015, 10:32 AM   #11789
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Quote:
Originally Posted by Lonestar View Post
what blank pistons do you guys use to build your own?

thanks!

Paul
I use the Kyosho ones, W5303-08, because they have little dimples in them which should prevent the bit from walking around the face of it when I try and drill.
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Old 03-18-2015, 10:33 AM   #11790
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I want to use different ball studs/cups because I hate popping off the ball cup to make adjustments. Has anyone switched theirs out for another company? I was gonna use associated but their quality sucks so I was thinking about Yokomo. Does anyone have any input?
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