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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 12-20-2013, 06:41 PM   #9076
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New chassis.

http://www.flickr.com/x/t/0099009/ph...7638867362856/
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Old 12-20-2013, 06:54 PM   #9077
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Default Little help here...

So let me see if i understand you....
More angle... (more slip angle) means more side bite?
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Old 12-20-2013, 08:41 PM   #9078
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chassis looks like something that will be an option maybe help the stock guys but man i want it
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Old 12-20-2013, 08:57 PM   #9079
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Quote:
Originally Posted by K_King View Post
Hi Kevin, for your old chassis, was it a replacement one? I notice at under the gearbox its hasn't caved in. Cheers,
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Old 12-20-2013, 09:17 PM   #9080
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Originally Posted by spdrac430 View Post
chassis looks like something that will be an option maybe help the stock guys but man i want it
yeah thats what i was thinking more for stock... mods will need a bit more beef due to big jumps and hauling butt
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Old 12-20-2013, 11:31 PM   #9081
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Quote:
Originally Posted by omarsez View Post
So let me see if i understand you....
More angle... (more slip angle) means more side bite?
Less side bite in the corners.

Quote:
Originally Posted by gelshocker View Post
Hi Kevin, for your old chassis, was it a replacement one? I notice at under the gearbox its hasn't caved in. Cheers,
Yeah this car was bought a few months after. The initial batch had issues but it was fixed rather shortly.

Here is my car now. Stupid light!

I put the gear diff in. Aluminum idler and moved my ESC to the rear to try that and I'm at 61.5% with a shorty pack vs 1630 and saddles with a stiffer car.

My theory is that a stiffer car relies on weight distribution a bit more than a flexible one. I should be able to get away with a lighter car that flexes more at that weight than a stiffer one. That's my hope anyway.
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Kyosho Ultima RB6 & RB6.6 Car Thread-image.jpg  
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Old 12-20-2013, 11:33 PM   #9082
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Here's my layout.
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Kyosho Ultima RB6 & RB6.6 Car Thread-image.jpg  
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Old 12-21-2013, 12:08 AM   #9083
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Is that 61.5% weight on the rear wheels with the shorty?

Your layout is the same as mine but I was thinking going back to saddles but I'm not sure.
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Old 12-21-2013, 06:10 AM   #9084
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Originally Posted by K_King View Post
Here's my layout.
After I ditch my tekin and go Orion, I'm doing the exact same layout. Only thing is, I run an m11x and I don't think my receiver is small enough to mount on the chassis guards.
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Old 12-21-2013, 06:45 AM   #9085
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Originally Posted by nickdawg18 View Post
After I ditch my tekin and go Orion, I'm doing the exact same layout. Only thing is, I run an m11x and I don't think my receiver is small enough to mount on the chassis guards.
Other option is to stick the reciever next to the speedo. I have put a couple of pieces of brass sheet under the reciver to balance the chassis side to side.

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Old 12-21-2013, 07:35 AM   #9086
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Originally Posted by Tom87 View Post
Is that 61.5% weight on the rear wheels with the shorty?

Your layout is the same as mine but I was thinking going back to saddles but I'm not sure.
Yup. With saddles the car was good but always felt a little lazy. I think that the extra weight doesn't always add grip. I think that it helps for high speed stuff but low speed exits it could get looser since the car was just heavier.
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Old 12-21-2013, 07:53 AM   #9087
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Here's the gear diff



Heres what my Saddle Packs weighed in as




Here's what I am with all the new parts and shorty with the ESC in the rear.

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Old 12-21-2013, 08:38 AM   #9088
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Originally Posted by K_King View Post
Here's the gear diff



Heres what my Saddle Packs weighed in as




Here's what I am with all the new parts and shorty with the ESC in the rear.

nice.. what wt oil you using on the diff? going to give a gear diff a try once my ball diffs starts to go bad
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Old 12-21-2013, 09:02 AM   #9089
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Originally Posted by omarsez View Post
Wondering if someone can explain a few things to me.
First question... in the manual don't know what "Skid Angle" is and what it affects>.. if someone can clarify that for me that would be great.

Second question is about the kyosho rear suspension holders. In the picture you see that i have the aluminum "RF" and the Rear holders. (forgot to say im running midmotor) and ive seen the instruction sheet but im having a hard time understanding? Is the RF supposed to have the adjustable inserts like the rear or not? And if i have the right ones do i only adjust the rear? HELP>>>
Looks to me like you have the old version RF, and the new version RR(with inserts for width). There is a new version RF(with inserts for width):
http://www.amainhobbies.com/product_...pension-Holder
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Old 12-21-2013, 09:12 AM   #9090
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nice.. what wt oil you using on the diff? going to give a gear diff a try once my ball diffs starts to go bad
5k to start. It feels similar to my diff right now. If it's too much I have 3k to try. I run my diff pretty locked in mod.
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