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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 01-27-2017, 12:32 PM   #14161
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Quote:
Originally Posted by JAE View Post
Dope new strap eliminates waterfall and uses a turnbuckle


http://rawspeedrc.com/kyosho-rb6-6-c...-strap-set-up/

Agree, it looks awesome - love CF. However, if you have to undo 4 screws plus a turnbuckle screw just to change batteries...sheesh.

(I know...first world problems...)

...I'll probably still get one.

Last edited by BK24; 01-27-2017 at 12:45 PM.
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Old 01-27-2017, 01:13 PM   #14162
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Needs shock posts. Anyone know if the zx6 and rb6 aluminum shock posts are the same size? Links below

https://www.amainhobbies.com/kyosho-aluminum-battery-post-set-gunmetal-fs2-sp-kyolaw41gm/p219092


https://www.amainhobbies.com/kyosho-aluminum-battery-post-set-gunmetal-kyoumw520gm/p222069







Quote:
Originally Posted by BK24 View Post
Agree, it looks awesome - love CF. However, if you have to undo 4 screws plus a turnbuckle screw just to change batteries...sheesh.

(I know...first world problems...)

...I'll probably still get one.
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Old 01-27-2017, 02:14 PM   #14163
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Quote:
Originally Posted by BK24 View Post
Agree, it looks awesome - love CF. However, if you have to undo 4 screws plus a turnbuckle screw just to change batteries...sheesh.

(I know...first world problems...)

...I'll probably still get one.
You take your battery out to charge? hehehe... I like that it will allow better battery placement. My electronics are very cramped up front. Should have gone with a KO radio instead of the 4PX. Indeed first world problems.
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Old 01-27-2017, 02:15 PM   #14164
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Originally Posted by JAE View Post
Needs shock posts. Anyone know if the zx6 and rb6 aluminum shock posts are the same size? Links below

https://www.amainhobbies.com/kyosho-...aw41gm/p219092


https://www.amainhobbies.com/kyosho-...w520gm/p222069
You have to use the FS2 battery posts. Or you'll be doing some odd shimming, and who wants that annoyance?
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Old 01-27-2017, 02:22 PM   #14165
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I own a 6.6 laydown and standup running stock. Prefer it to all buggies I've had thus far. Have not driven it mod yet. Does this buggy have the forward grip of the b6 and other competitors in MOD using the 3 gear laydown? I've noticed a recent trend that a lot of people runnning mod with a laydown are running 4 gear. Wondering why that is. Considering trading my b6 for another 6.6 to run solely in Mod
I'm going to try the 4 gear laydown with the shocks mounted in front today. Its dry in Socal so LRH wont be as high bite as it usually is. Hoping to get more forward bite out of the car without it washing out so easily. I did stuff 15 grams of weight under the transmission as it says on Tebos setup. Will report back in. Track should be dry with a bit of dust build up after the 2nd hour they are open.
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Old 01-28-2017, 09:20 AM   #14166
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How was the 4 gear? Thx

Quote:
Originally Posted by jpcopeland1 View Post
I'm going to try the 4 gear laydown with the shocks mounted in front today. Its dry in Socal so LRH wont be as high bite as it usually is. Hoping to get more forward bite out of the car without it washing out so easily. I did stuff 15 grams of weight under the transmission as it says on Tebos setup. Will report back in. Track should be dry with a bit of dust build up after the 2nd hour they are open.
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Old 01-28-2017, 09:44 AM   #14167
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As I figured, when the track was drying up, when the winds kicked up, moving to tread and 4 gear with really good, felt way more planted, and I didn't necessarily notice much loss in corner speed. I need to correctly prep some tread for when those types of conditions happen, but it was definitely miles better then 3 gear, car would wash out the rear end very easily. I've got the parts to build both transmissions for a quick change, so i'll be ready for next race day.
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Old 01-29-2017, 03:37 AM   #14168
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What is the weight bias of the rb6.6.

I just did my rb6 and I got 38/62

My b5m lite is 36/64.

Just wondering what the 6.6 is in Stock form.

Thank you
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Old 01-29-2017, 08:11 PM   #14169
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Originally Posted by FallenAllDay View Post
Currently have an rb6, absolutely love the way it drives however the rear grip is really lacking and struggle to get forward bite outta the turns for the tracks I run on, medium grip at best to low/loose outdoor tracks. Is the new chassis and side guards make a significant difference compared to the original chassis?? I run mod so I'm already running 4 gear stand up, rf brass weight etc just chasing some grip, thanks guys.
I have been tinkering with an RB6 also, agree feels quite nice. However i was told to cut the side guards and trim the edges of the chassis to run the shorty sideways. I also trimmed the tabs from the front of the waterfall to get a few more mm.
I was quite astounded by the improvement. Ran on a really low grip blown out track yesterday and had quite good results.
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Old 02-02-2017, 03:02 AM   #14170
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Does anyone know where I can find a db2 chassis. I need a new one. Or used doesn't matter as long as the rear holes aren't worn out past being good. Mine let go and I just got the car where I really am liking it
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Old 02-05-2017, 12:40 AM   #14171
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Default 2hole or 3hole pistons

Anyone running 1.4 3 hole pistons or any 3 hole pistons vs 2 hole? What practical effect have you noticed on the buggy? Thx
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Old 02-05-2017, 03:12 AM   #14172
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More holes make the initial pack more resistant then it becomes a softer feel due to turbulence in the oil basically the 3x1.4 is in between a 2x1.6 and a 2x1.7.
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Old 02-05-2017, 11:37 AM   #14173
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I have a laydown rb6.6....Practically speaking, would moving from 1.6x2 all around to 1.4x3 give me less traction as the pack goes up...1.4x3
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More holes make the initial pack more resistant then it becomes a softer feel due to turbulence in the oil basically the 3x1.4 is in between a 2x1.6 and a 2x1.7.
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Old 02-06-2017, 04:08 AM   #14174
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No more traction the initial pack is more kinda the first input into the shock it stalls movement more then gets softer. U could try making a 3x1.3 to do what your looking at or try a 2x1.5. Are u looking for less traction for or rear and in what situation?
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Old 02-06-2017, 07:35 AM   #14175
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Looking for more traction, sidebite and coming out of the corner on power. First Time running the laydown 6.6 with a mod Motor. Have no traction issues in stock but haven't put down serious power...I have these vrp eu pistons that do not come in 1.7 2 hole rear so was debating to go 1.4 3hole rear with the 2x1.6 fronts, 2x1.6 all around, .or just 1.4 3 hole all around. Track runs electrons in med bite clay. Thx for the help
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No more traction the initial pack is more kinda the first input into the shock it stalls movement more then gets softer. U could try making a 3x1.3 to do what your looking at or try a 2x1.5. Are u looking for less traction for or rear and in what situation?
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