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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 08-06-2014, 01:29 PM   #10681
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Originally Posted by aloksatoor View Post
I was at the same point as you, was around 130 grams under weight with the 150gram shorty heheh, so I used a full weight pack for stock for more consistency, theres a step up which I can only clear the first few laps on my big 1/8 sized track. Where did you get the copper sheet? Been looking for something like that.
What shorty pack is this that's that light?
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Old 08-06-2014, 01:48 PM   #10682
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Anyone tried drilling holes on the inside of the rear arms yet?
A couple of us are doing this at my track. The difference is ridiculous way more stable exiting turns, the rear end doesn't want to step out on you. The car just simply drives better every where. We haven't gone quite that narrow yet but it was definitely in the works in the next couple of weeks. We also used a B5m as our base for measuring. We were trying to keep it on the DL but some guy from San Diego just put the idea on blast. hahaha
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Old 08-06-2014, 02:25 PM   #10683
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What shorty pack is this that's that light?
A bunch

http://www.amain.com/ProTek-R-C-2S-S...200mAh/p271097
http://www.promatchracing.com/prodde...prod=2S350090C

and trinity and smc also have some. Weight is around 150 grams. But it looses punch mid way cos of the voltage drop (we got a big 1/8 track for 17.5 stock), I might put that in for the winter back in where the size is a bit less.
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Old 08-06-2014, 10:44 PM   #10684
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A couple of us are doing this at my track. The difference is ridiculous way more stable exiting turns, the rear end doesn't want to step out on you. The car just simply drives better every where. We haven't gone quite that narrow yet but it was definitely in the works in the next couple of weeks. We also used a B5m as our base for measuring. We were trying to keep it on the DL but some guy from San Diego just put the idea on blast. hahaha
i wonder where he got that idea…………….I think we both know who's idea it was
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Old 08-07-2014, 12:51 AM   #10685
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Zachy Poos :P

I'm going to test both holes tomorrow along with the most inner on the tower. Hoping for good results.

Did you have to change your dampening at all?

Last edited by K_King; 08-07-2014 at 01:21 AM.
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Old 08-07-2014, 06:12 AM   #10686
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Originally Posted by CaseyD View Post
A couple of us are doing this at my track. The difference is ridiculous way more stable exiting turns, the rear end doesn't want to step out on you. The car just simply drives better every where. We haven't gone quite that narrow yet but it was definitely in the works in the next couple of weeks. We also used a B5m as our base for measuring. We were trying to keep it on the DL but some guy from San Diego just put the idea on blast. hahaha
what sort of track is it working on?
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Old 08-07-2014, 06:19 AM   #10687
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Originally Posted by CaseyD View Post
A couple of us are doing this at my track. The difference is ridiculous way more stable exiting turns, the rear end doesn't want to step out on you. The car just simply drives better every where. We haven't gone quite that narrow yet but it was definitely in the works in the next couple of weeks. We also used a B5m as our base for measuring. We were trying to keep it on the DL but some guy from San Diego just put the idea on blast. hahaha
Could this be applied to rear motor cars as well?
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Old 08-07-2014, 08:10 AM   #10688
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Originally Posted by K_King View Post
Zachy Poos :P

I'm going to test both holes tomorrow along with the most inner on the tower. Hoping for good results.

Did you have to change your dampening at all?
Zack and my son are running 1.6x2 30w gold springs
28mm of shock shaft showing
I'm running 1.4x3 tapered 30w white springs
28mm of shock shaft showing

Both seem to be working really good.
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Old 08-07-2014, 08:18 AM   #10689
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Could this be applied to rear motor cars as well?
Not real sure if Zack kept the same set up when he switched from MM to RM on Saturday. You could always find some one with RM B5 and measure the width between the top shock mounts and the width between the bottom shock mounts and drill holes accordingly.

What type of track?

So far it's been used on a low/med bite track and at OCRC. Low/med bite track showed some good results, OCRC was ridiculous. My son went from fish tailing the straight to the rear end basically centering itself when he grabbed a handful of throttle. I drilled my sons holes kind of narrow, 17.5mm out from the sway bar mounting holes.
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Old 08-07-2014, 10:34 AM   #10690
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Originally Posted by CaseyD View Post
Not real sure if Zack kept the same set up when he switched from MM to RM on Saturday. You could always find some one with RM B5 and measure the width between the top shock mounts and the width between the bottom shock mounts and drill holes accordingly.

What type of track?

So far it's been used on a low/med bite track and at OCRC. Low/med bite track showed some good results, OCRC was ridiculous. My son went from fish tailing the straight to the rear end basically centering itself when he grabbed a handful of throttle. I drilled my sons holes kind of narrow, 17.5mm out from the sway bar mounting holes.
I run on a low traction track. This does sound very interesting
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Old 08-07-2014, 10:59 AM   #10691
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Quote:
Originally Posted by CaseyD View Post
Not real sure if Zack kept the same set up when he switched from MM to RM on Saturday. You could always find some one with RM B5 and measure the width between the top shock mounts and the width between the bottom shock mounts and drill holes accordingly.

What type of track?

So far it's been used on a low/med bite track and at OCRC. Low/med bite track showed some good results, OCRC was ridiculous. My son went from fish tailing the straight to the rear end basically centering itself when he grabbed a handful of throttle. I drilled my sons holes kind of narrow, 17.5mm out from the sway bar mounting holes.
Yup. When I used the drill press on Saturday I noticed a nice difference. I was also on 1.6x2 and 30 with golds. My buddy also ran the arms in his main so we could get more feed back and really liked the new hole.

Have you tried the new hole plus inside on the tower?

I'm also D-in on both.
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Old 08-07-2014, 11:26 AM   #10692
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Yup. When I used the drill press on Saturday I noticed a nice difference. I was also on 1.6x2 and 30 with golds. My buddy also ran the arms in his main so we could get more feed back and really liked the new hole.

Have you tried the new hole plus inside on the tower?

I'm also D-in on both.
Nice mod. Please keep us updated. Anyone thinking of making the inner pivot narrower as well? I got a exotek MM narrow pair which I use not sure if its narrower than the d in setup.
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Old 08-07-2014, 11:37 AM   #10693
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Nice mod. Please keep us updated. Anyone thinking of making the inner pivot narrower as well? I got a exotek MM narrow pair which I use not sure if its narrower than the d in setup.
Already done in solidworks
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Old 08-07-2014, 11:44 AM   #10694
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Already done in solidworks
Awesome!
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Old 08-07-2014, 05:06 PM   #10695
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I'm working with Kevin on the narrower rear blocks. Should have designs done shortly. We'll do a small run initially to test then get into production depending on demand. To give you an idea, the blocks will be designed to use the existing RB6 rear pills and when using A/A with the new blocks it will be about 2mm narrower than Din/Din.
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