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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 06-06-2016, 11:28 PM   #13291
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Quote:
Originally Posted by psycho02 View Post
Supposedly the Rb7 is supposed to be out in August.
Possibly September I've heard. But with Kyo it can always be longer.
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Old 06-07-2016, 07:02 AM   #13292
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Would we expect to see a standalone RZ6 kit at some point?

What are people expecting to see from the RB7? Something like the RZ6 or a more direct evolution like the B6 or XB2?
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Old 06-07-2016, 08:22 AM   #13293
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I have my RZ6 working pretty good on dirt right now. It is very easy to drive consistently. I will post my setup after this weekend when I will be able to really gauge as to how it is working against others.
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Old 06-07-2016, 09:41 AM   #13294
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Quote:
Originally Posted by Kraig View Post
I have my RZ6 working pretty good on dirt right now. It is very easy to drive consistently. I will post my setup after this weekend when I will be able to really gauge as to how it is working against others.
Please keep us informed
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Old 06-07-2016, 10:06 PM   #13295
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Quote:
Originally Posted by Kraig View Post
I have my RZ6 working pretty good on dirt right now. It is very easy to drive consistently. I will post my setup after this weekend when I will be able to really gauge as to how it is working against others.
Did you build the gear diff with the conversion parts? I have the aluminum diff cover, thinking I should build it up the gear diff with it. I will try both and see what works best.

Quote:
Originally Posted by Gayosaka View Post
Please keep us informed
I am curious too.
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Old 06-08-2016, 04:06 AM   #13296
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[QUOTE=GIHOSU;14559339]Did you build the gear diff with the conversion parts? I have the aluminum diff cover, thinking I should build it up the gear diff with it. I will try both and see what works best.

You shouldn't have to use that Aluminum diff cover. All you have to do is use a bearing instead of the plastic bushing and that diff is bulletproof. I have been running them in my ZX6 for over a year now and no leaks. I think that the Aluminum diff half is for the 2wd gear diff which is different. the RZ6 uses the ZX6 gear diff.
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Old 06-08-2016, 10:35 AM   #13297
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Quote:
Originally Posted by GIHOSU View Post
Did you build the gear diff with the conversion parts? I have the aluminum diff cover, thinking I should build it up the gear diff with it. I will try both and see what works best.
I built the gear diff without the bearing modification (others have mentioned this mod) and tried it for one run. I probably had the wrong weight of oil in it and didn't like how it felt. So I built up a ball diff and I have been using that. I will probably try the gear diff again but I plan on using/trying something other than 5k.
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Old 06-08-2016, 10:37 AM   #13298
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Most of the guys that run the RZ6 here use anywhere from 8k to 15k in the diff. we are on high traction wet clay.
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Old 06-08-2016, 10:49 AM   #13299
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My track isn't like that so that probably explains why I didn't like it.
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Old 06-08-2016, 02:48 PM   #13300
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RZ6 low traction questions:

1. How does the RZ6 fare compared to the RB6 MM for low traction?
2. Will it squat and transfer the weight to the rear?
3. Is it capable of getting comparable rear grip and if so how?
4. Is there anti-squat adjustment?
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Old 06-12-2016, 10:11 AM   #13301
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My RZ6 was pretty good last night. I will get the setup posted later today. I just came in to do some other things, i.e. make sure nobody was causing trouble.

I will say this though. With my RB6 it wasn't reactive like my sons RB6. So I am trying to figure out what the problem is because I really believe that is holding my RZ6 back right now. Maybe you guys and girls can see something on the setup sheet I am missing or did wrong.

Stay tuned!
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Old 06-12-2016, 05:13 PM   #13302
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Default RZ6 Dirt Setup

Here is what I used this past Saturday. My hot lap was .1 off of the TQ's hot lap and he was running a 22 3.0. There is more in the car, just need to work on my driving issues.
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Last edited by Kraig; 09-29-2017 at 12:20 PM.
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Old 06-12-2016, 05:55 PM   #13303
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Thanks for sharing your setup. So you have plenty of rear grip but it's not handling as well as your son's RB6?

Have you played with the ride height? Perhaps match the RB6 and see what happens.
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Old 06-12-2016, 09:15 PM   #13304
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Welcome.

I have been up and down in ride height. There is something in this front end that is leaving me scratching my head. Maybe it is electronics related, not sure. Hopefully I find it otherwise it is time to swap front ends between the two cars.
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Old 06-12-2016, 09:43 PM   #13305
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Quote:
Originally Posted by Kraig View Post
Welcome.

I have been up and down in ride height. There is something in this front end that is leaving me scratching my head. Maybe it is electronics related, not sure. Hopefully I find it otherwise it is time to swap front ends between the two cars.
Try shortening the wheelbase by moving your rear hubs and arms forward. My shocks are up front and my speedo behind the motor. I'm also using the gear diff with 2k oil and it works great.
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