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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 12-12-2012, 11:47 AM   #3316
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Originally Posted by fullsyzz View Post
I tried this flipping the steering rack trick I found on Petit/Oople and it made the car easier to drive for me.
i thought about it, as all setup changes give and take, this seemed more like a band aid.
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Old 12-12-2012, 11:57 AM   #3317
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why would you take away the aggressiveness with geometry changes? springs and damping did not affect it too much? akerman angles still the same? Did you experience more front tire scrub?
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Old 12-12-2012, 01:05 PM   #3318
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Originally Posted by t8rtot View Post
i thought about it, as all setup changes give and take, this seemed more like a band aid.
I tried it, did make the car easier to drive on the high speed sections of the track (I race on astroturf, a mix of high a low grip depending on weather), on the slower speed sections of the track the car became lazy.
I flipped the rack back to stock and often put 1 or 2mm of spacers to increase the turn in and aggressiveness, as I find on tight and twisty tracks I want the back end to slide a little to help the car turn and square up quicker for the exit.
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Old 12-12-2012, 01:05 PM   #3319
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Originally Posted by Gitsum View Post
What is better for high speed steering 25/0 or 30/0?
30/0 is better for high speed steering when the car is really rolling... it will tame out your slower speed / infield steering, where the car isn't rolling much. 25/0 is better for low speed steering.

I found the infield steering to be a tad too aggressive for me, so I currently run 30/0. (but im not necessarily stuck there, still a work in progress)

There is another affect the car will see by going to 30/0, and that is more off-power steering, due to the increased front kick-up/pro-dive.
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Last edited by Cpt.America; 12-12-2012 at 01:55 PM.
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Old 12-12-2012, 03:56 PM   #3320
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New JC body painted up by Aflac Designs aka sparkwraps on the forum

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Kyosho SC-R SP | Orion R10 Pro | SchuurSpeed 17.5 | Savox 1258

Last edited by BranVita; 12-13-2012 at 08:12 PM.
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Old 12-12-2012, 05:11 PM   #3321
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New JC body painted up by Aflac Designs
Looks nice. You got red heatshrink on the rear shafts?
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Old 12-12-2012, 05:24 PM   #3322
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Originally Posted by aloksatoor View Post
Looks nice. You got red heatshrink on the rear shafts?
couldnt find black at the time I put them on,
reason for it is to help hold the Pins in place just in case the set screw
backs out
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Last edited by BranVita; 12-12-2012 at 06:02 PM.
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Old 12-12-2012, 06:08 PM   #3323
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one of the key features of the RB6 is it's super low center of gravity . i really don't think mounting your esc and receiver on top is going to help in any way . plus the car is heavy anyway.I run MM look at my chassis setup.
Yep...I don't have much of a choice right now because I run the same batts in all my cars. Full size stick batts. I checked out your set-up. No doubt, better for lower cg. It was just a surprise for me since Kyosho advertised full size stick pack w/MM combo, yet the batt can slide all over the place. I could put some foam back there, but it would be pressing against the motor! Thanks for the pic.
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Old 12-12-2012, 06:24 PM   #3324
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New JC body painted up by Aflac Designs

that looks very nice!
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Old 12-12-2012, 08:24 PM   #3325
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My cars only been to the track 3 times total, so about 10 packs through it. I was doing some matience on my car and noticed that where tranny sits on car my chassis is denting in kind of a sqaure looking shape. Is this a known issue? Is Kyosho Warrenting the chassis? If so how do I contact them?
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Old 12-12-2012, 10:09 PM   #3326
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Originally Posted by Mxer59 View Post
My cars only been to the track 3 times total, so about 10 packs through it. I was doing some matience on my car and noticed that where tranny sits on car my chassis is denting in kind of a sqaure looking shape. Is this a known issue? Is Kyosho Warrenting the chassis? If so how do I contact them?
This is a known issue. I think someone mentioned a revised chassis (with a tint of blue?). Can someone confirmed, and it is a new part number? Cheers,
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Old 12-13-2012, 05:06 AM   #3327
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[QUOTE=Mxer59;11548894]My cars only been to the track 3 times total, so about 10 packs through it. I was doing some matience on my car and noticed that where tranny sits on car my chassis is denting in kind of a sqaure looking shape. Is this a known issue? Is Kyosho Warrenting the chassis? If so how do I contact them?[/QUOTE

hers a link with a number.. i have heard they are replacing them for people.

http://www.kyoshoamerica.com/crm.asp?action=contactus
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Old 12-13-2012, 07:32 AM   #3328
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I decided to go back to the ball diff so I started to tear down the transmission yesterday. My aluminum suspension blocks also came in the mail so I decided to install that as well. I took out the composite blocks and realized I made a HUGE rookie build mistake. I had the wide inner block and the NARROW outer block installed!! I think my 2nd driving experience with my RB6 will be much improved.
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Old 12-13-2012, 08:02 AM   #3329
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I decided to go back to the ball diff so I started to tear down the transmission yesterday. My aluminum suspension blocks also came in the mail so I decided to install that as well. I took out the composite blocks and realized I made a HUGE rookie build mistake. I had the wide inner block and the NARROW outer block installed!! I think my 2nd driving experience with my RB6 will be much improved.
Trying my damnest to not use the laughing out loud icon .
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Old 12-13-2012, 08:12 AM   #3330
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[QUOTE=eper;11549759]
Quote:
Originally Posted by Mxer59 View Post
My cars only been to the track 3 times total, so about 10 packs through it. I was doing some matience on my car and noticed that where tranny sits on car my chassis is denting in kind of a sqaure looking shape. Is this a known issue? Is Kyosho Warrenting the chassis? If so how do I contact them?[/QUOTE

hers a link with a number.. i have heard they are replacing them for people.

http://www.kyoshoamerica.com/crm.asp?action=contactus
last time i talked with kyosho usa on this issue . their stand is only extreme cases will they do anything .first you will need to call then you would need to take pictures send them to them if they feel it is bad enough they will have you send in your chassis to them . after that they will make a determination as what to do . i know of only one that they replaced . mine has a little dent i made a insert that goes under the transmission problem solved .
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