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Kyosho Ultima RB6 & RB6.6 Car Thread

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Kyosho Ultima RB6 & RB6.6 Car Thread

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Old 12-21-2016, 08:46 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Kyosho Ultima RB6 & RB6.6 Car Thread
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
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 01-01-2013, 05:24 PM
  #3781  
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Originally Posted by b121774
aka diana?
Haha foam, the swype function on my phone doesn't airways cooperate.
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Old 01-01-2013, 06:04 PM
  #3782  
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JCI3348Y - JConcepts Mono 2.2 Rear Wheel w/12mm Hex so these will work with the rb6?
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Old 01-01-2013, 06:06 PM
  #3783  
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Originally Posted by tony montana
JCI3348Y - JConcepts Mono 2.2 Rear Wheel w/12mm Hex so these will work with the rb6?
I use those but a serrated wheel nut is a must.
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Old 01-01-2013, 06:07 PM
  #3784  
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Originally Posted by t8rtot
Haha foam, the swype function on my phone doesn't airways cooperate.
airways? guess it doesnt, lol
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Old 01-01-2013, 06:08 PM
  #3785  
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and these for the fronts? JConcepts Mono 2.2 Front Wheel w/12mm Hex (Yellow) (4) (B4.1/RB5)
[JCI3347Y]
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Old 01-01-2013, 06:13 PM
  #3786  
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Originally Posted by tony montana
and these for the fronts? JConcepts Mono 2.2 Front Wheel w/12mm Hex (Yellow) (4) (B4.1/RB5)
[JCI3347Y]
Yes, I use the same on both my b4 and rb6
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Old 01-01-2013, 06:18 PM
  #3787  
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Originally Posted by t8rtot
Raising roll center would increase side bite, correct? Hmm
Incorrect. Raising the roll center increases roll resistance which provides less traction gain on that end of the car, whenever the car is rolling. Wider track = higher RC = less traction while rolling (throughout the corner).
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Old 01-01-2013, 07:22 PM
  #3788  
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Default Spur/Pinion Questions

Based on the suggestion of some guys 10-20 pages back I am going to go with 69/34 (spur/pinion) in stock class.

Since Kyosho does not seem to make a 69 do you recommend I go Kimbrough or JC Silent Spur Gear? Other then buying Associate slipper pads is there anything else I need?

For a pinion gear... who do you recommend I go with?

Thanks everyone!
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Old 01-01-2013, 07:26 PM
  #3789  
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gearing in stock is not always the same from motor to motor. I run a Reedy Sonic 17.5, endbell timed to the middle(pretty much MAXED) of the silver motor screw and am running 27/72. Seems to have the best balance of torque/rpm. Its a rocket. Thats in my b4 though but should be the same for the rb6
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Old 01-01-2013, 07:54 PM
  #3790  
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Just picked one of these kits up for a little change of pace.

The track is indoor - clay - 70x40ft. I plan to run the kit box stock until I get a feel for it, then make adjustments/upgrades as necessary.

Couple of questions:

1. Mid vs. Rear - what are most people going with on this type of surface? I've seen indoor track setups running mid, but most clay tracks running rear. Going to be running Gold Barcodes front/rear as it is the popular choice at the track.

2. Gearing - 13.5 blinky/boosted gearing - Reedy 13.5 - what is a good starting point for both? Looking to pick up a range of pinons. 76T is the stock spur right? I have no problem tuning to temp, just looking for a start.

3. I've read some posts that mention getting the rear aluminum suspension holders, but I've seen narrow and wide .. what is the stock replacement?

Thanks in advance.
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Old 01-01-2013, 08:24 PM
  #3791  
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Originally Posted by Kopanas
Based on the suggestion of some guys 10-20 pages back I am going to go with 69/34 (spur/pinion) in stock class.

Since Kyosho does not seem to make a 69 do you recommend I go Kimbrough or JC Silent Spur Gear? Other then buying Associate slipper pads is there anything else I need?

For a pinion gear... who do you recommend I go with?

Thanks everyone!
kimborough. Just add slipper pads, K plates are fine.
I went 69/30 reedy sonic @ 40 deg endbell

Last edited by silvalis; 01-01-2013 at 09:03 PM.
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Old 01-01-2013, 08:35 PM
  #3792  
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Originally Posted by silvalis
kimborough.
I went 69/30 reedy sonic @ 40 deg endbell
I really liked 72/31-30 with my Tekin gen2 30deg end bell
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Old 01-01-2013, 09:15 PM
  #3793  
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I gear 72/33 and my speed is great.
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Old 01-01-2013, 09:26 PM
  #3794  
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Originally Posted by Kopanas
Based on the suggestion of some guys 10-20 pages back I am going to go with 69/34 (spur/pinion) in stock class.

Since Kyosho does not seem to make a 69 do you recommend I go Kimbrough or JC Silent Spur Gear? Other then buying Associate slipper pads is there anything else I need?

For a pinion gear... who do you recommend I go with?

Thanks everyone!
The JConcepts Sikent Speed spurs are nice because they're precision machined for perfect balance but I'm not convinced that this is much of a benefit to justify the added expense.

I run 69/31 with a Trinity D3.5 with timing maxed and I'm happy with it. But I've also switched to running the Avid Triad spur with Avid top shaft. They make a machined 69T spur as well. My car has never felt better but I'm no expert.

Just experiment with pinion sizes to find the feel you like best. Bigger pinion will give you more top end and will make your motor run a little hotter so be sure to temp it after a few laps.
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Old 01-01-2013, 10:02 PM
  #3795  
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Originally Posted by tony montana
and these for the fronts? JConcepts Mono 2.2 Front Wheel w/12mm Hex (Yellow) (4) (B4.1/RB5)
[JCI3347Y]
Having come from a B4.1 to an RB6. I run the Jconcepts mono wheels. Both fronts and rears work well. The fronts have an almost identical offset but the wheels have a deeper hex in them. I have had them bind a little with the stock RB6 axles. I just run a Tamiya 1/2mm touring car spacer. I am now switching to the RB5 axles with hexes as most of the local team guys (Joe Pillars, Shuan Dunlap, and Andy Dibrino) have done. The rears have about a 1/2mm deeper offset. So if you do not space them the rear will be about 1mm narrower than with Kyosho wheels.

As far as stock motor gearing. I usually gear 33 or 34/72 using associated or now Avid triad gears. I run full timing on a D3.5.

Troy
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