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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 11-19-2016, 01:20 PM   #13891
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would this car be good for a beginner to racing off road competitively, or is it too much for someone new?
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Old 11-19-2016, 02:02 PM   #13892
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would this car be good for a beginner to racing off road competitively, or is it too much for someone new?
My son and I each started with RB6's. I'm still surprised at the durability. I would recommend the aluminum front arm holder though. Not because they break but they get warped and twisted and it's sometimes hard to tell. If you start with a used buggy, take it all apart and check everything. Especially check the hinge pins for straightness and be sure there is no binding. I would do this with any used buggy.
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Old 11-19-2016, 10:39 PM   #13893
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I've got 1.6 2 hole front pistons. For the rear, on hand, I've got either 1.6 2 hole or 1.4 3 hole. Running med to high bite clay in stock. Which rears do every one recommend? Thx
[/QUOTE]

I have the 1.4 3 hole in my wheeler and they are good with heavier weight oil but I'd go with the 1.6x2 on the 2wd.
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Old 11-19-2016, 11:15 PM   #13894
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Thx!!! What oil and springs for 1.6 2 hole all around? Kyosho shocks feel so much stiffer than competitors (are, xray, etc) with the same oil and spring rates.






I have the 1.4 3 hole in my wheeler and they are good with heavier weight oil but I'd go with the 1.6x2 on the 2wd.[/QUOTE]
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Old 11-20-2016, 11:01 AM   #13895
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Used to race a lot of oval back in the early 90's and the only thing I kept was a sprint car chassis that I made way back then. Local track runs offroad and oval and I had a old RB6 laying around soooo...

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Old 11-20-2016, 10:36 PM   #13896
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Thx!!! What oil and springs for 1.6 2 hole all around? Kyosho shocks feel so much stiffer than competitors (are, xray, etc) with the same oil and spring rates.
Depending on your track conditions, for medium bite clay I'd go 32.5F, 30R with kit pink front spring and kit gold rear. For higher grip, I go up in oil 35/32.5 etc and go one softer on front spring still run the gold rear. Hope this helps.
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Old 11-25-2016, 03:54 PM   #13897
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I had to dig a little bit for this thread....... Page 3? Yikes! I'm not digging that! Lets get it rolling here a little more guys. Anyway, I've been a TLR guy my whole life and decided to make a huge switch. Built this bad mamma jamma over this last weekend and ran it for the first time this last Wed. I'm a lost of words on how good this car is. By far the smoothest out of the box and the quality is over the top. I can't say enough....







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Old 11-25-2016, 06:47 PM   #13898
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How good is this car with laydown tranny installed on clay vs Losi or the B6d with laydown. Going shopping
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Old 11-25-2016, 07:28 PM   #13899
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I like it better than my b6d laydown. more aggressive steering, better suspension, equal traction,jumps a little lower which could be good or bad.
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How good is this car with laydown tranny installed on clay vs Losi or the B6d with laydown. Going shopping
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Old 11-25-2016, 07:33 PM   #13900
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So u had both and raced both
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Old 11-25-2016, 08:30 PM   #13901
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I actively race both.
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So u had both and raced both
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Old 11-25-2016, 08:40 PM   #13902
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I put the 3 gear laydown in the RB6.6 right off the bat and I love it. I have a little bit of Tebo's surf city setup in it and a little bit of my own based off the track I run only cuz I didn't know what to expect never owning a Kyosho. This car worked right off the bat.
Now the TLR 22 3.0 laydown I just had not too long ago was really good too, but it just was never consistent to me or my driving style. It felt like I was always trying to find something better, or it pushed too much or it had no forward bite. It was always one thing or another.
First night racing the RB6.6 and I was confident with it, way more consistent, easier to drive and I was way faster with it first night than I was weeks with the TLR. I didn't have to really work that hard or stay on my toes like the TLR.
I have drove the B6 3 gear laydown that other guys at my track have enough to know that on power with the shocks forward is a little different to get used to and there are just way too many things that you need to do to make that car work, flat arm this, gull wing this, or gull wing tower here, shim the bulkhead this or do that, dremel this. Just build it, throw a setup on it and go and that's what the RB6.6 is good for in my opinion.

I don't want to start a war or anything so hopefully nobody takes offense, but this is just clearly my opinion.
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Old 11-26-2016, 01:52 AM   #13903
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Anyone running a front wing? Wanted to try one but don't know if need a mount? Thx


Quote:
Originally Posted by HotRod127 View Post
I put the 3 gear laydown in the RB6.6 right off the bat and I love it. I have a little bit of Tebo's surf city setup in it and a little bit of my own based off the track I run only cuz I didn't know what to expect never owning a Kyosho. This car worked right off the bat.
Now the TLR 22 3.0 laydown I just had not too long ago was really good too, but it just was never consistent to me or my driving style. It felt like I was always trying to find something better, or it pushed too much or it had no forward bite. It was always one thing or another.
First night racing the RB6.6 and I was confident with it, way more consistent, easier to drive and I was way faster with it first night than I was weeks with the TLR. I didn't have to really work that hard or stay on my toes like the TLR.
I have drove the B6 3 gear laydown that other guys at my track have enough to know that on power with the shocks forward is a little different to get used to and there are just way too many things that you need to do to make that car work, flat arm this, gull wing this, or gull wing tower here, shim the bulkhead this or do that, dremel this. Just build it, throw a setup on it and go and that's what the RB6.6 is good for in my opinion.

I don't want to start a war or anything so hopefully nobody takes offense, but this is just clearly my opinion.
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Old 11-26-2016, 06:08 AM   #13904
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Anyone running a front wing? Wanted to try one but don't know if need a mount? Thx
Yup I run the Proline one some race days. See the wiki above.
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Old 11-26-2016, 08:10 AM   #13905
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Ive been running the JC front wing.You don't need a mount for that!
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