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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 Forums Thread 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 11-11-2012, 11:27 PM
  #2521  
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Originally Posted by lbckevin View Post
Dias ran the new Triad tonight on his RB6 as well. It worked great for him.
Do you know what stock gearing Dias runs at WCRC with his schurr speed?
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Old 11-12-2012, 07:06 AM
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This past Saturday I was able to actually get a good comparison of my RB5WC vs RB6. We are running the KBRL series here in Arizona and this past weekends venue was rained out so the organizer moved it indoors to where we ran RD1 and where I ran my RB5WC to a 1st place finish.

Same exact layout, same track conditions, over a 20 lap average my RB6 picked up 1.1 seconds a lap over the RB5WC.

Qualified 3rd, worked my way up to 1st. 2 bad laps half way through pushed me back to 2nd and 15 seconds behind 1st. The last 6 laps I was charging and finished 1.8 seconds behind 1st. I decided to change the front tires from what I ran in qualifying which was a mistake (they were inconsistent). Should have just used what I qualified with.

Losi 37.5/32.5 and White/Gold was working great. May even try Gold/Gold next weekend on a higher traction indoor track, but I think for me the White/Gold are good.

Dean
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Old 11-12-2012, 07:42 AM
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i was just having this conversation with a friend about stiffer fronts.. thanks for the feedback.
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Old 11-12-2012, 10:53 AM
  #2524  
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Originally Posted by DeanV View Post
This past Saturday I was able to actually get a good comparison of my RB5WC vs RB6. We are running the KBRL series here in Arizona and this past weekends venue was rained out so the organizer moved it indoors to where we ran RD1 and where I ran my RB5WC to a 1st place finish.

Same exact layout, same track conditions, over a 20 lap average my RB6 picked up 1.1 seconds a lap over the RB5WC.

Qualified 3rd, worked my way up to 1st. 2 bad laps half way through pushed me back to 2nd and 15 seconds behind 1st. The last 6 laps I was charging and finished 1.8 seconds behind 1st. I decided to change the front tires from what I ran in qualifying which was a mistake (they were inconsistent). Should have just used what I qualified with.

Losi 37.5/32.5 and White/Gold was working great. May even try Gold/Gold next weekend on a higher traction indoor track, but I think for me the White/Gold are good.

Dean
Definitely thanks for the report.


Allen
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Old 11-12-2012, 11:18 AM
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Originally Posted by lbckevin View Post
Dias ran the new Triad tonight on his RB6 as well. It worked great for him.
is the triad slipper available for the rb6 yet? or is he using the b4 version? can anyone provide a link please?
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Old 11-12-2012, 02:07 PM
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it is almost out...it is still being tested by some of the Kyosho factory drivers.
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Old 11-12-2012, 02:26 PM
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the diameter for the top shaft was the only necessary change wasn't it???

hopefully this wont take long..
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Old 11-12-2012, 02:42 PM
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Default race report

Built my RB6, first time it touched the track was on the practice day for the first race in the big regional series. I had heard from others that the car had a LOT of steering and I like a mellower setup. Track was high traction clay with several sections where traction rolling was a problem, and only 1 big jump. I used the setup suggested in the manual but made a few changes.

4 degree inserts in front hubs (with bulkhead set on 25 for a total of 29 degrees)
white front spring
white rear spring
2 internal limiters in rear shocks.
21mm rear ride height
23mm front ride height
1mm under all upright ballstuds

car was really good, steering was kind of mellow and the rear stayed planted. Against this crowd I would usually be struggling to even make the A. This race I qualified 5th and finished 4th overall. The rear ride height was really low but it seemed to help avoid traction rolls in the sweeper. Here is a video of the A2 main, I start 5th with the orange, yellow, and green body...

+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
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Old 11-12-2012, 02:58 PM
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welcome aboard!

i see you went softer and your car has excessive body roll it appears? any reason as to why you softened the rear that much? i know body roll may have been a concern. just curious.

just seemed the rear was leaning and not rotating as much which is why that purple car is all on you in the corners towards the middle/end of the race

Last edited by t8rtot; 11-12-2012 at 03:08 PM.
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Old 11-12-2012, 03:16 PM
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Default race on new track layout

http://www.youtube.com/watch?v=I-TthqKCMRw
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Old 11-12-2012, 03:21 PM
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Originally Posted by t8rtot View Post
welcome aboard!

i see you went softer and your car has excessive body roll it appears? any reason as to why you softened the rear that much? i know body roll may have been a concern. just curious.

just seemed the rear was leaning and not rotating as much which is why that purple car is all on you in the corners towards the middle/end of the race
You are probably right. I didn't have too many practice runs to experiment. I also didn't have gold front springs. With white front and gold rears I thought the car was still a tiny bit loose in the rear and was a little too aggressive steering wise. I have a lot of trouble driving an aggressive car. With the white rears it locked in the rear and tamed the steering a little. Car was probably a little slower but a fair bit easier to drive. Also my car seemed to traction roll in the sweeper a lot less than others, which was a big advantage during the day.

I am not great at setup and I just try a few things and go with what feels best. With the limited time I had this is what I came up with. Maybe I will get some front golds and try gold gold. I was also using 35 weight oil in front and 30 weight in the rear. Maybe I should make the oil heavier?
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Old 11-12-2012, 04:41 PM
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Has anyone tried Cody Turner setup? What do you think?
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Old 11-12-2012, 04:45 PM
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I just picked one of these up this weekend and I wanted to know how this compares to the DEX210. I loved my Rango but sold it because part support was non existent at the near by tracks. I am new to 2wd drive buggy (driven mostly 4x4 short course and 1/8 buggy) and any insight between the two and the kit in general would be great. In the mean time, I am going to catch up on the previous posts on this thread.
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Old 11-12-2012, 04:59 PM
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What are the must have springs for the RB6, putting my kit together now and do RB6 springs fit on the FS2 SP 4wd car. $20 a pair I sure hope so.
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Old 11-12-2012, 05:05 PM
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Nothing like the rango. One of the laziest 2wd buggies out there. This is a whole world apart in build handling everything. As for springs get the gold rears and for front just for tuning maybe white. Most setup sheets are pink front and gold rears.
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