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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 10-30-2012, 05:00 PM   #2251
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Originally Posted by Cpt.America View Post
there is another set of holes in the rb6 chassis. same width as the rb5. More towards the middle of the car. I dremmeled my RB5 battery strap nice and short. You have to use a 2mm shim underneath the rb5 ALU battery posts, and it works like a charm.
Hmm I saw those but that would mean saddles wont fit without breaking out the screwdriver .

But screw the saddles I think I will go with a shorty first then a full pack. All I got is hobbyking saddles and some gens ace lil puffed.
Full packs a ip 6800 and a 70c protek shorty so preferred for racing anyways.
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Old 10-30-2012, 05:39 PM   #2252
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Actually got to "race" the RB6 for the first time this past Saturday (prior to that just a day of practice).

The car is amazing.

Large outdoor track (SRS: Cactus Classic track)

Before the weekend, I had decided to switch from 'standard' packs to 'shorty' packs. Honestly I did it so I could have cleaner wiring (I did not like my receiver sitting on the side). After driving the car with the 'shortys' it was great.

I still had a bit too much steering, so this weekend I am testing the 4d caster instead of 0d.

My setup was a mix of the 'Japan All Around' and 'Kohta Akimoto'
differences: 0d caster, .5 rear hubs. (setup attached)

Wiring Before:


Wiring After:


The ESC and Antenna wires are ran through the channel.


Now I have the carbon straps coming in also.

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Attached Files
File Type: pdf Ultima_RB6_DeanVuckovich_2012-10-30_Outdoor_17.pdf (476.6 KB, 128 views)
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Old 10-30-2012, 06:44 PM   #2253
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I run the following in mine (blinky mode)

12.5 high torque rotor
maxed endbell timing
blinky mode?
You put a 12.5 rotor in place of the 17.5 rotor?
Turn the degrees on the can to max?

Told ya I was new to electrics...lol

Mine is a stock tekin, guess I have some stuff to buy..lol
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Old 10-30-2012, 07:31 PM   #2254
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blinky mode?
You put a 12.5 rotor in place of the 17.5 rotor?
Turn the degrees on the can to max?

Told ya I was new to electrics...lol

Mine is a stock tekin, guess I have some stuff to buy..lol
That 12.5 refers to the diameter of the rotor, in this case 12.5mm. It has nothing to do with the turns (rating) which, also in this case, would be 17.5 turns.
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Old 10-31-2012, 12:50 AM   #2255
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Buy new knuckles . How did you use the rb5 strap though guys? I just checked the holes are wider on the rb5 than the 6.
Yeah I think I am going to go that route, just so I have 2 sets with different inserts in them for different tracks.
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Old 10-31-2012, 04:52 AM   #2256
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That is why I bought extra knuckles.
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Old 10-31-2012, 06:20 AM   #2257
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Default midship

I will be testing and tuning with MM motor this weekend at the club race . with the run up to the big double i am putting in a 17.5 from the 13.5 should be able to carry more corner speed without a lot of wheel spin on the tight track . i have a good starting point should be fun at any rate .
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Kyosho Ultima RB6 & RB6.6 Car Thread-rb6-midship-014.jpg   Kyosho Ultima RB6 & RB6.6 Car Thread-rb6-midship-015.jpg   Kyosho Ultima RB6 & RB6.6 Car Thread-rb6-midship-016.jpg   Kyosho Ultima RB6 & RB6.6 Car Thread-rb6-midship-019.jpg   Kyosho Ultima RB6 & RB6.6 Car Thread-rb6-midship-018.jpg  

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Old 10-31-2012, 08:29 AM   #2258
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I will be testing and tuning with MM motor this weekend at the club race . with the run up to the big double i am putting in a 17.5 from the 13.5 should be able to carry more corner speed without a lot of wheel spin on the tight track . i have a good starting point should be fun at any rate .
Myself and a few friends are planning on running mid motor for one race and I need a decent if not good MM setup. I have run midship before with a DEX210, and Schumacher Cougar SV2. What are you running as far as ball stud washers. Any additional weight out back? This is going to be done on very wet clay.
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Old 10-31-2012, 09:16 AM   #2259
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Originally Posted by fastestwon View Post
I will be testing and tuning with MM motor this weekend at the club race . with the run up to the big double i am putting in a 17.5 from the 13.5 should be able to carry more corner speed without a lot of wheel spin on the tight track . i have a good starting point should be fun at any rate .
With how loose your track is, I think it would be a big mistake. but you wont know till you try!
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Old 10-31-2012, 09:26 AM   #2260
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It seems a tire with less tread (worn down) would grip better
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Old 10-31-2012, 09:45 AM   #2261
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Originally Posted by jpcopeland1 View Post
Myself and a few friends are planning on running mid motor for one race and I need a decent if not good MM setup. I have run midship before with a DEX210, and Schumacher Cougar SV2. What are you running as far as ball stud washers. Any additional weight out back? This is going to be done on very wet clay.
In the front i am running the camber links as long as possible and 1mm under the ball stud on the bulkhead.
In the rear the camber links are as low as possible and as short as possible

Shock setup:
Pink springs in the front with stock pistons and 32.5wt associated shock oil
Gold springs in the rear with stock pistons and 25wt associated shock oil

I also run the wc rear a arms. And .5 degree hubs.

No weight, any where
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Old 10-31-2012, 09:47 AM   #2262
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In the front i am running the camber links as long as possible and 1mm under the ball stud on the bulkhead.
In the rear the camber links are as low as possible and as short as possible

Shock setup:
Pink springs in the front with stock pistons and 32.5wt associated shock oil
Gold springs in the rear with stock pistons and 25wt associated shock oil

I also run the wc rear a arms. And .5 degree hubs.

No weight, any where
Cool, I have all that stuff minus the 32.5AE oil. Will run Losi 30 in it's place. Thanks a lot.
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Old 10-31-2012, 09:50 AM   #2263
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Quote:
Originally Posted by Cpt.America View Post
With how loose your track is, I think it would be a big mistake. but you wont know till you try!
Quote:
Originally Posted by t8rtot View Post
It seems a tire with less tread (worn down) would grip better
x2

On a track like his, I'd give ghosted green barcodes a try, and avoid MM.
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Old 10-31-2012, 10:05 AM   #2264
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Originally Posted by Cpt.America View Post
With how loose your track is, I think it would be a big mistake. but you wont know till you try!
yeah won't know if i don't try it . car seems very balanced and has a lot of rear grip as front . i ran it on an outdoor track that has loose dust just to try it the car hooked up nicely . equipped with revtec 17.5, speed passion revention pro, turnigy nano tech 4200 65c shorty , spektrum s6040 servo, and sr3100 receiver, no weight added car with no shock fluid balanced perfect with the stock springs .
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Old 10-31-2012, 11:51 AM   #2265
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Thumbs up suspension???

Can someone explain how the wider suspension nholder change the cars performance versus the narrow holders and are you guys using the new arm or have you gone back to the older WC arm?
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