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R/C Tech Forums Thread Wiki: Kyosho Ultima RB6 & RB6.6 Car Thread
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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 10-18-2015, 06:49 PM   #12556
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I'm enjoying the J Concepts illusion body, seems to handle a wee bit better in the air. I could just be crazy though too lol
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Old 10-18-2015, 07:14 PM   #12557
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Got the buggy ordered along with a few parts. Got the 1 aluminum rear hubs but looks like I may have messed up there? Been about 22 years since I've run a Kyosho.
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Last edited by madweazl; 10-18-2015 at 07:29 PM.
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Old 10-18-2015, 07:29 PM   #12558
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I'm using the .5 degree hubs. Also seems like what most others here are using as well. Haven't tried the 1's though so I have no opinion on which suit my driving style better. Sorry I couldn't be of more help
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Old 10-18-2015, 07:56 PM   #12559
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Quote:
Originally Posted by twindad98 View Post
Have any of you done much testing with the sideways square pack? I drove a B5M Friday and I loved the way it drove. I was 1 second faster than with my RB6. It just seemed I could push the B5M harder. It felt more planted. That's why I'm wondering about the sideways square pack. More weight down low.
I'm currently running the Zack Rogers setup and it's always edgy to me. Almost unpredictable at times. It could be my driving style just curious if any of you have dealt with this before.
Try putting the 1mm shim under your rear toe block instead of the .5mms that just about everyone's setup calls for. I've found this takes the edgy-ness out of the car and makes the car feel really planted. I still have plenty of steering and have actually made the wheel base longer to help tame the handling a bit.
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Old 10-19-2015, 10:30 AM   #12560
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Has anyone seen this part for sale online yet? if so post a link please. Thanks!

http://www.tresrey.com/yaiba/products/YRG093_eng.html

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Old 10-19-2015, 10:47 AM   #12561
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Originally Posted by 13Maschine View Post
Has anyone seen this part for sale online yet? if so post a link please. Thanks!

http://www.tresrey.com/yaiba/products/YRG093_eng.html


I know where there's one. What are you willing to pay?
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Old 10-19-2015, 11:23 AM   #12562
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Do you have one personally? or can you post a link?
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My JUNSI POWERED Rides: Xray XB2 CE, Hot Bodies D413, Kyosho RB6, HobbyWing Xerun 3.1, Futaba 4PX, Futaba and MKS Servos, Speed Passion Hirosaka and HW V10 Powerplants!
First car Kyosho Pegasus and RC10CE! More than 25 years Racing! Happy to lend a helping hand. Just ask! :)
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Old 10-19-2015, 11:27 AM   #12563
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Do you have one personally? or can you post a link?
I'll pm you. There is only one that I know of.
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Old 10-19-2015, 11:42 AM   #12564
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Default ESC MM placement

I'm having trouble finding room for my esc in the rb6. I have a v3.1 hobbywing stock and a tekin gen 2 I can use. ( right now I have a standard servo, but I could switch a low pro servo. which I think would let me barely squeeze a esc in front of the battery ) But both seem to big to be placed against the waterfall without modding it somehow. Any suggestions be appreciated.
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Old 10-19-2015, 12:38 PM   #12565
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Originally Posted by Franzchise View Post
I'm having trouble finding room for my esc in the rb6. I have a v3.1 hobbywing stock and a tekin gen 2 I can use. ( right now I have a standard servo, but I could switch a low pro servo. which I think would let me barely squeeze a esc in front of the battery ) But both seem to big to be placed against the waterfall without modding it somehow. Any suggestions be appreciated.
Here's an idea for you lol..
Did the wiring on this not mine.

This one is mine..
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Old 10-19-2015, 04:45 PM   #12566
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Here's an idea for you lol..
Did the wiring on this not mine.

This one is mine..
Those look very nice. Great wiring jobs. I'm always trying to get it to look as clean as possible. So I like the layout.

Is there anyway to fit an esc without removing parts of the waterfall and battery mount. Prob not I'm thinking. Also does the battery brace on the RB6 provide much stiffness to the chassis. I built mine with the LW chassis and looking at the brace setup, it doesn't seem to proved much stiffness so by removing it, it wont negatively impact me for carpet and turf.
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Old 10-19-2015, 04:54 PM   #12567
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Originally Posted by Franzchise View Post
Those look very nice. Great wiring jobs. I'm always trying to get it to look as clean as possible. So I like the layout.

Is there anyway to fit an esc without removing parts of the waterfall and battery mount. Prob not I'm thinking. Also does the battery brace on the RB6 provide much stiffness to the chassis. I built mine with the LW chassis and looking at the brace setup, it doesn't seem to proved much stiffness so by removing it, it wont negatively impact me for carpet and turf.
My sons car is setup with the ESC on a bigger shelf I made that connects the waterfall to the battery brace. It puts the weight up high but at the rear of the car. Also it's hard to get a body to fit over it. Seems to handle really well though.
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Old 10-19-2015, 05:15 PM   #12568
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My sons car is setup with the ESC on a bigger shelf I made that connects the waterfall to the battery brace. It puts the weight up high but at the rear of the car. Also it's hard to get a body to fit over it. Seems to handle really well though.
I'm nervous to put any weight up high as my local track is carpet and turf. I could see how it beiung back against the motor it not being as bad as slapped in the middle. but I'm thinking I can fit my tekin gen 2 esc in between the battery and motor. I just didn't want to take it out of my yokomo.
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Old 10-19-2015, 06:21 PM   #12569
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Move the battery back closer to the motor and put it in front.
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Old 10-19-2015, 07:29 PM   #12570
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I run the Hobbywing 3.1 as well. I use both of the battery braces with the open end facing rear. So it's:

servo [ shorty [ esc | motor

You may have to cut the battery strap short. I have a custom carbon fiber one, but you should be able to cut the stock one short if needed. The motor and battery wires coming up from the esc are on the battery side.

It's basically like pg 33, step 56 in the manual. I race on a carpet track, so rear traction is not an issue. If you're on dirt, you're probably want to have the battery all the way back or even sideways.

I am also a bit of a newbie, for what it's worth. But my RB6 is really balanced on carpet.
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