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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 11-05-2012, 10:03 PM   #2371
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Quote:
Originally Posted by aloksatoor View Post
More likely to spin out in low traction. The
advantage is rotation, you can corner at speeds unlikely in a rear motor and carry that momentum. And also mid motors jump like a dream can correct the nose a lot easier mid air than a rear motor with throttle input.
If I'm making the right assumptions...a decent indoor track (WCRC, OCRC...) traction would be considered medium to high traction? Why aren't more people building there RB6 with mid config? I just finished building mine rear motor but sounds like mid has nicer handling. I was originally under the impression that mid was favorable only for carpet.
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Old 11-05-2012, 10:58 PM   #2372
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Medium, mid motor really shines on places like astroturf. Even HRH would be pushing it.
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Old 11-06-2012, 12:36 AM   #2373
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Originally Posted by JPKinsella View Post
Do the GHEA pistons 4hole 1.3mm best setup for pistons yet IMO!!!!
I was down at WCRC a week a go. Won stock class and qualed 3rd in mod..
Car is Dialed...
What size holes are the kit 5 hole pistons.
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Old 11-06-2012, 12:49 AM   #2374
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Originally Posted by toast. View Post
If I'm making the right assumptions...a decent indoor track (WCRC, OCRC...) traction would be considered medium to high traction? Why aren't more people building there RB6 with mid config? I just finished building mine rear motor but sounds like mid has nicer handling. I was originally under the impression that mid was favorable only for carpet.
If the track from whatever reason, Dries out, gets loose, mid motor is a nightmare. It has to be near perfect high traction all night to be useful.
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Old 11-06-2012, 03:57 AM   #2375
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the track originally bought the 6 to run on had unreal traction. The tire of choie there were slicks. This would be a good setup for that I would think.
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Old 11-06-2012, 04:22 AM   #2376
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Originally Posted by fastestwon View Post
drives like a touring car . likes to be driven harder . for those of you that want it i can email it to you PDF file too large for here to post
that's funny because that is how my Xfactory felt on high traction track. It was like I had to learn how to drive it all over again. I met the pipe a number of times the first couple practice laps. I've been contemplating putting an X6 together with k BB for fun, but no high bite tracks around these parts! And if you guys think that WCRC is medium traction... then we must race on ice...
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Old 11-06-2012, 04:57 AM   #2377
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Originally Posted by jpcopeland1 View Post
If the track from whatever reason, Dries out, gets loose, mid motor is a nightmare. It has to be near perfect high traction all night to be useful.
For whatever reasons the mid motor works really well for me even on my local track that has low traction most of the time . as far as being loose i have to push it really hard to break it loose and even at that it corrects fast you no longer have the rear motor whip in the corners . i will be keeping the mid setup . if i go to a different track i'll just tweak it some one way or another . the only way to have a car that handles well is one that is balanced evenly for the best corner speed . i think with this new platform for Kyosho gone are the days of thinking rear is better in my opinion . it suits my driving style as i raced touring cars for 15 years this car is as close to a touring car handling .

disclaimer....just my two cents of thought
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Old 11-06-2012, 05:29 AM   #2378
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Originally Posted by fastestwon View Post
For whatever reasons the mid motor works really well for me even on my local track that has low traction most of the time . as far as being loose i have to push it really hard to break it loose and even at that it corrects fast you no longer have the rear motor whip in the corners . i will be keeping the mid setup . if i go to a different track i'll just tweak it some one way or another . the only way to have a car that handles well is one that is balanced evenly for the best corner speed . i think with this new platform for Kyosho gone are the days of thinking rear is better in my opinion . it suits my driving style as i raced touring cars for 15 years this car is as close to a touring car handling .

disclaimer....just my two cents of thought
I'm going to have to try it. Even my xfactory was good in loose conditions. Damn now I need another RB6. Anyone need an R10 pro 160A with 1 race day on it?
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Old 11-06-2012, 05:33 AM   #2379
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i would ask that you guys watch fastestwon's previous vids, his car was sliding in remotor and i think he only had a 17.5 in w/timing...

that last vid of his mid car was on rails... i think the whole "mid motor for astro only" concept is false to begin with because i've owned an Xfactory car and ran indoors on dirt/clay.. but if you've never run it, don't knock it
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Old 11-06-2012, 05:42 AM   #2380
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I agree.....his car was not very stable in previous videos.
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Old 11-06-2012, 06:08 AM   #2381
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This sat I have a few more things to try in rm config. Im going to switch to mm for the 3rd rd and main. Its a club race, so I dont really care how it goes. I'll let ya know how it went. Building up another trans today.
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Old 11-06-2012, 06:12 AM   #2382
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Originally Posted by Yeti AS3 View Post
This sat I have a few more things to try in rm config. Im going to switch to mm for the 3rd rd and main. Its a club race, so I dont really care how it goes. I'll let ya know how it went. Building up another trans today.
DOH! Totally forgot I have a spare trans! Thanks for the reminder.
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Old 11-06-2012, 06:15 AM   #2383
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Wondered how long it would take to figure that out.
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Old 11-06-2012, 06:26 AM   #2384
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For those that haven't driven rear motor, they react much differently to wheelspin. His car did look a lot better in that vid, but midmotor cars are much less likely to have the rear step out once you overpower the rear. Going to MM worked for him, but I'd recommend you all try it and see how it works on your surfaces.

I ran a Cougar for some time, and loved the way it cornered. Nothing could touch it going into the corner, or coming out. However, on my home track which has a tendency to get a bit dusty, I couldn't put the power down in between the corners. That said, I have seen Xfactory cars do very well here.
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Old 11-06-2012, 06:31 AM   #2385
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Im gonna try both and then deside which I like better. But mid looked much better on his track.
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