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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 01-10-2017, 11:54 AM   #14101
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Would the weight add more traction or mess up a good thing
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Old 01-11-2017, 03:50 AM   #14102
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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.
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Old 01-11-2017, 03:55 AM   #14103
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What shock package and were are your rear hubs. Also what rear toe and anti squat are u running.
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Old 01-11-2017, 06:06 AM   #14104
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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.
Myself and several others have noticed big gains of wet astroturf (which is super slippery) with the 6.6 chassis, especially with the grub screws backed out at the rear.
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Old 01-11-2017, 09:09 AM   #14105
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Default Lay down tranny

I ran the lay down tranny for the first time last night and absolutely love the way my car feels. Jumps really well, corners like it's on rails, just amazing.
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Old 01-11-2017, 11:54 AM   #14106
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Originally Posted by Rcforlife13 View Post
Would the weight add more traction or mess up a good thing
When I ran the 4 gear transmission I used this gear. I didn't notice anything and it definitely didn't hold me back.
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Old 01-11-2017, 01:42 PM   #14107
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Are the grub screws you speak of on the bottom outside in front of gearbox?
What do they do?

Quote:
Originally Posted by RogerM View Post
Myself and several others have noticed big gains of wet astroturf (which is super slippery) with the 6.6 chassis, especially with the grub screws backed out at the rear.
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Old 01-11-2017, 07:57 PM   #14108
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Originally Posted by randywhite30 View Post
I ran the lay down tranny for the first time last night and absolutely love the way my car feels. Jumps really well, corners like it's on rails, just amazing.
I agree. I have two race days on my new 6.6. 3 gear laydown on what I would call medium grip. 17.5 class. Car is responsive to setup changes. Steering feels almost perfect, rotates really nice, reacts quick but still very predictable without any bad habits. Just a little loose accelerating out of the tightest corners, but just have to be smooth with the trigger. Car feels really planted and stable, even when pushing hard. This is my first Kyosho since the Turbo Optima in '87. Long time AE guy. Very high quality, killer shocks and diff. This is a fantastic car, no doubt.
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Old 01-11-2017, 10:12 PM   #14109
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So you guys running the 3 gear tranny ?
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Old 01-12-2017, 06:18 AM   #14110
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Originally Posted by danwilson View Post
Are the grub screws you speak of on the bottom outside in front of gearbox?
What do they do?
On the rear edges of the side guards.

They run into plain holes in the chassis and affect the torsional stiffness of the car by a lot more than you'd imagine.
Difficult to feel in your hands but on track the car hooks up a fair bit better with them backed out.

Got caught out running the laydown car when a sudden rain storm hit about 5mins before my final. All I had time to do was swap to suitable tires and back out those screws, car was balanced and easy to drive. Not so much so I'd suggest the 3 gear laydown is the weapon of choice in low grip modified racing but it was comparatively better than the competitors cars with the same time to make changes, actually managed to stay ahead of several who had changed to stand up cars (mine wasn't built at that time).
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Old 01-12-2017, 08:00 AM   #14111
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Quote:
Originally Posted by Rcforlife13 View Post
So you guys running the 3 gear tranny ?
For the 17.5 class, then yes I am running it.
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Old 01-12-2017, 11:34 AM   #14112
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Is there any difference between KYOORG03X x-rings and KYOORG03XR x-rings except color?
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Old 01-12-2017, 11:49 AM   #14113
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Originally Posted by BK24 View Post
Is there any difference between KYOORG03X x-rings and KYOORG03XR x-rings except color?
The KYOORG03X (clear ones) are pure silicon and should swell less if they swell at all in the shock oil. These are the ones all the team drivers are using as it makes for smoother shock.

The KYOORG03XR (red ones) are a rubber compound. They will work fine but may make the shock a bit stickier after they swell up.
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Old 01-13-2017, 09:59 AM   #14114
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Thanks tel.

Is there a difference between rb6.6 #34302 vs. #34302B?
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Old 01-13-2017, 10:08 AM   #14115
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I have had the 3-gear laydown in my car since I have built it in October. I run a 8.5 in it and it is truly the best car I have driven in a while.
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