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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 10-16-2012, 08:20 AM   #1636
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got it now, so you referring to item 147 in the manual? but the only sell the ceramic in item 151. Damn everything in 1/10 so small
if you want to buy spares for the diff, buy the bfast kit. But don't bother breaking it out until you feel the stock kit is notchy and requires a rebuild. The balls/ring it comes with are perfectly good.
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Old 10-16-2012, 08:20 AM   #1637
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Captain a while back I commented on the RB5 and asked how user friendly it would be for someone who's never built a car. Well the same question applies here? Is it build friendly? Can I run stock out of the box and have success? I'd rather spend the extra $$ on quality than just get by.
There really isn't much that is required for the car outside of what is in the box to be very competitive besides the right tires for your track. The "upgrades" are not required and mostly bling. The only conciveabe upgrade would be .5 or 1 degree rear carriers if you need the rear traction. I have never broken a plastic rear carrier and I'm not the best driver. I'm hearing breaking of the steering rack here, but the way I see it, if you break the RB6 just like the RB5... it is your fault or the guy that hit you's fault. I have always run(RT5, SCR, RB5) plastic Tplates, plastic steering racks, and plastic hingepin holders in the front and not had issues. I race 2 - 3 times a month and am usually in the middle of the pack.
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Old 10-16-2012, 09:00 AM   #1638
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Originally Posted by Orion_2kTC View Post
Captain a while back I commented on the RB5 and asked how user friendly it would be for someone who's never built a car. Well the same question applies here? Is it build friendly? Can I run stock out of the box and have success? I'd rather spend the extra $$ on quality than just get by.
I think if you take your time, don't rush, and like the other guys said, don't over torque your screws down, the car is pretty "new builder friendly". But... not as friendly as say a B4. There may be a few small challenges, mainly because there are a few tiny things missing or hard to understand from the manual. But if you have built the RB5 before, you should have no problem with the RB6.

The only pieces I recommend buying for the car right out of the gate, are the aluminum rear suspension hangers.
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Old 10-16-2012, 09:31 AM   #1639
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Sean...

I finally got my Rb6.
Sweet Kevin!! I'll be back at WC as soon as my nitro schedule dies down, gotta big money race - Byron's Challenge at Rev - this weekend. If you're looking to unload your RB5, I know someone who really wants one, let me know.
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Old 10-16-2012, 12:11 PM   #1640
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Sweet Kevin!! I'll be back at WC as soon as my nitro schedule dies down, gotta big money race - Byron's Challenge at Rev - this weekend. If you're looking to unload your RB5, I know someone who really wants one, let me know.
And now I want his setup
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Old 10-16-2012, 12:21 PM   #1641
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Are the wide outer and inner suspension holders recommended or the regular ones?

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Originally Posted by Cpt.America View Post
I think if you take your time, don't rush, and like the other guys said, don't over torque your screws down, the car is pretty "new builder friendly". But... not as friendly as say a B4. There may be a few small challenges, mainly because there are a few tiny things missing or hard to understand from the manual. But if you have built the RB5 before, you should have no problem with the RB6.

The only pieces I recommend buying for the car right out of the gate, are the aluminum rear suspension hangers.
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Old 10-16-2012, 12:41 PM   #1642
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Are the wide outer and inner suspension holders recommended or the regular ones?
At this point, at least in my opinion and on my setup sheet, its still up in the air. The car is SO aggressive, I am going to go back to the narrow/stock width holders and see how it performs. Going back to the narrow holders will lower the roll center, shifting some of the traction back to the rear of the car. At this point, I don't think the wides are the way to go. But... YMMV. I may go back!
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Old 10-16-2012, 01:03 PM   #1643
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Originally Posted by Cpt.America View Post
At this point, at least in my opinion and on my setup sheet, its still up in the air. The car is SO aggressive, I am going to go back to the narrow/stock width holders and see how it performs. Going back to the narrow holders will lower the roll center, shifting some of the traction back to the rear of the car. At this point, I don't think the wides are the way to go. But... YMMV. I may go back!
does anyone know what the stock plastics are, on the car?
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Old 10-16-2012, 01:06 PM   #1644
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does anyone know what the stock plastics are, on the car?
Certainly the narrow/stock width? I haven't measured.
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Old 10-16-2012, 01:13 PM   #1645
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does anyone know what the stock plastics are, on the car?
I'm pretty sure there the wide ones are stock, I'm still running them. I was also thinking about trying the narrow. I think it could be the way to go, but that's personal preference
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Old 10-16-2012, 01:17 PM   #1646
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Mine came with both.
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Old 10-16-2012, 01:19 PM   #1647
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In the manual the stock setting for the rear shock stay is RF2 which is the wide one unlike the RB5 which worked better with the RF block...
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Old 10-16-2012, 01:19 PM   #1648
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Mine came with both.
Silly me.. i didn't even look at the stock plastic to see what was included. I went right for my aluminum off my RB5.
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Old 10-16-2012, 01:19 PM   #1649
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In the RB6 kit, it comes with both. RF & RF2 suspension holders. The setup is for the RF2's, which are the "Wide" suspension holders. I use the aluminum "Wide" ones on mine. I have tried both but I seem to like the wide better.
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Old 10-16-2012, 01:26 PM   #1650
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Yesterday was my first practice with the RB6 in a high traction small track...I started with stock setup and man....this car is soooo aggressive!

I made some changes to calm it down a little bit...

Longer wheelbase (3mm front-1mm rear)
4 degrees hub bush making it total 29 degrees caster
42.5 oil front-37.5 oil rear LOSI
move the front suspension to inner hole
less droop in the rear

The car at the end of the day was really easy to drive and unofficially broke the lap record!

I ended up with shorty lipo in front location

The car jumps great and is very predictable now making it difficult to make mistakes. I want to try gold springs in the rear next...
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