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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 10-14-2012, 10:12 PM   #1561
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Thx.
Your welcome.
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Old 10-14-2012, 10:42 PM   #1562
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What part in the steering keeps breaking! Just wanting to know before I run! Thanks if possible part # and does the gear diff fit this car.
Crank arm set....UM716
My buddy broke his the first day w17.5. He turned into a tube...same tube claimed mine.
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Old 10-14-2012, 10:45 PM   #1563
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Crank arm set....UM716
My buddy broke his the first day w17.5. He turned into a tube...same tube claimed mine.
Mine hasn't broken yet here, and I've taken a few wicked tumbles. Not to say I don't have 2 sets of spares just in case
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Old 10-14-2012, 10:48 PM   #1564
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same thing with the JConcepts 12mm b4.1 wheels. I have used the serrated nuts and it just fits. standard nuts won't make it on.
Durango nuts are cheap and awesome. I use them on all my cars. Don't worry, Durango parts won't cause a Kyosho to break
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Old 10-14-2012, 11:24 PM   #1565
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Crank arm set....UM716
My buddy broke his the first day w17.5. He turned into a tube...same tube claimed mine.
Thanks for the heads up!!! Still wanting to know about the gear diff if anyone knows!
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Old 10-14-2012, 11:27 PM   #1566
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anyone can go and buy a gear diff. Its not used by racers, but for the practice pros and bashers.
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Old 10-14-2012, 11:27 PM   #1567
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Why would you want a gear diff when Kyosho has the best ball diff and is pretty much idiot proof right out of the box?
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Old 10-14-2012, 11:28 PM   #1568
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anyone can go and buy a gear diff. Its not used by racers, but for the practice pros and bashers.
lol omg..... That was just eerie....
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Old 10-15-2012, 01:20 AM   #1569
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I am having an issue with drive on this buggy as it feels very soft, I am running a 8.5t and a 21 pinion and the bottom end is very soft, I have run the 4.1 in the past with this motor and it has plenty of punch but it feels off in the new buggy. We tried all diff pinion sizes and theyball felt off. What is every one else running as I read some have 7.5t motors. I have new gearing coming with 30-35 pinion on a 70t spur so I hope to find a good mix with those combinations. Love the handling of the buggy but.
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Old 10-15-2012, 01:23 AM   #1570
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Slipper is tight as well as diff as we tried adjusting these as well. I just watch some of the video and all the buggies look like they are flying. It was weird as the laps felt clean and on the pace but the times were down by nearly 1 sec compared to my 4.1
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Old 10-15-2012, 01:33 AM   #1571
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Slipper is tight as well as diff as we tried adjusting these as well. I just watch some of the video and all the buggies look like they are flying. It was weird as the laps felt clean and on the pace but the times were down by nearly 1 sec compared to my 4.1
Have you tried looking at Tebos setup for mod as far as gearing goes? I know two locals who run their RB6 in mod and they are just as fast if not faster then any B4.1. I will talk to them tomorrow about their setups for mod. Also what kind of battery packs are you running? Motor? Speed control? they all come into account from going from one manufacturer too another. Your dealing with a heavier car out of the box then a B4.1 so that gearing strategy goes out the Window.
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Old 10-15-2012, 01:40 AM   #1572
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Originally Posted by v1r killer View Post
I am having an issue with drive on this buggy as it feels very soft, I am running a 8.5t and a 21 pinion and the bottom end is very soft, I have run the 4.1 in the past with this motor and it has plenty of punch but it feels off in the new buggy. We tried all diff pinion sizes and theyball felt off. What is every one else running as I read some have 7.5t motors. I have new gearing coming with 30-35 pinion on a 70t spur so I hope to find a good mix with those combinations. Love the handling of the buggy but.
I'm running a viper vtx10/nosram pure2(lrp x20) 8.5 geared at 22/76, bottom end is a bit too strong.

I assume your diff and slipper are set up correctly, so I'd be looking at your speed controller or tx.
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Old 10-15-2012, 01:46 AM   #1573
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Originally Posted by v1r killer View Post
I am having an issue with drive on this buggy as it feels very soft, I am running a 8.5t and a 21 pinion and the bottom end is very soft, I have run the 4.1 in the past with this motor and it has plenty of punch but it feels off in the new buggy. We tried all diff pinion sizes and theyball felt off. What is every one else running as I read some have 7.5t motors. I have new gearing coming with 30-35 pinion on a 70t spur so I hope to find a good mix with those combinations. Love the handling of the buggy but.
Tebo at the Nats was running a 76/21 with a 7.5 Orion VST Pro and Orion R10Pro 160 Amp version. Just as fast as Cav and Maifield, another question. Are you running on Dirt or another type of surface? Only asking because all of the setups we have right now are for clay or blue groove dirt. Nothing yet for say carpet, or astro turf.
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Old 10-15-2012, 01:47 AM   #1574
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I'm running a viper vtx10/nosram pure2(lrp x20) 8.5 geared at 22/76, bottom end is a bit too strong.

I assume your diff and slipper are set up correctly, so I'd be looking at your speed controller or tx.
Agreed. If his slipper is locked in mod he has some serious issues elsewhere.
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Old 10-15-2012, 01:54 AM   #1575
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I'm running a viper vtx10/nosram pure2(lrp x20) 8.5 geared at 22/76, bottom end is a bit too strong.

I assume your diff and slipper are set up correctly, so I'd be looking at your speed controller or tx.
I reset my speedy while at track invade that was it, I will pull my slipper down I think and check it , funny thing we had 2 x new buggies each had the same prob on both. I have new pads coming so I might try the new pads and see if thy makes diff. This is my first slipper I have had issues with. Do the pads need to be ruffed up before installing for a bit more grip??
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