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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 12-11-2012, 01:58 AM   #3286
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just made the switch from 22 to RB6, so I'm 100% k-car

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Old 12-11-2012, 04:26 AM   #3287
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Quote:
Originally Posted by aloksatoor View Post
@eper

I am going to try your setup for the shorty. Why did you jump to red front directly? How did the whites feel with shorty all the way front? I do like more steering than most, whether that makes me fast or not is another matter, does make me happier with my car . Just afraid reds will take away a lot more steering.

I have both white and red to try and thinking of going to white first.

Last week I found more speed with my current delta rc winter track running a full 300 gram lipo with pink/gold since the track is super rutted from 1/8 nitro and has fewer twisty bits than the summer tracks.
my bad thats supposed to be pink. like i said when i was trying to post it i was extremely sick.
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Old 12-11-2012, 05:03 AM   #3288
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Default better battery support

if you are using a short pack i found an easy way of making a shorter battery hold down . if i wanted to use a fan i could .on the rear all you need to do is use two ball cup ends long . cut the length flush just under the ball cup side . trim so it will fit down in the middle hole of the battery holder put a counter sunk screw in the bottom to secure . on the top drill holes on the top and reinstall the top support cut the battery top brace to length . real easy
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Kyosho Ultima RB6 & RB6.6 Car Thread-imag0765.jpg   Kyosho Ultima RB6 & RB6.6 Car Thread-imag0764.jpg  

Last edited by fastestwon; 12-11-2012 at 05:35 AM.
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Old 12-11-2012, 05:10 AM   #3289
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Well finally finished my build and all I can say is....I haven't been this impressed with a kit since my last X-ray build. The car went together very nicely and i was pretty much able to hide the majority of the wiring. Waiting on my Esc to come in before I get to toss her on the track. I did start my shock setup with 1.6 2 hole pistons f/r with 32.5/30. On the bench it feels a tad soft but might work.
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Old 12-11-2012, 08:33 AM   #3290
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Kyosho Released UM720B SPSP Front Sus. Plate Type-B (RB6/RB5/RT5). Anyone know what this does?
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Old 12-11-2012, 09:16 AM   #3291
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Originally Posted by oosh123 View Post
Kyosho Released UM720B SPSP Front Sus. Plate Type-B (RB6/RB5/RT5). Anyone know what this does?
The B length front suspension brace is compatible with the stock rb6 width. The type C is the Rb5 WC and is narrowest. The original ( A i presume though it is not marked) is the rb5, sc, and rt5 length and is widest.
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Old 12-11-2012, 09:55 AM   #3292
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Thanks for the PM's regarding the stickpack/MM config guys! I think I found a pretty elegant solution. Hopefully it will help anyone else with the same problem. I used the rear battery mount and slid it up against the posts in the rear. Sponge taped it to the chassis and everything fits perfectly.
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Old 12-11-2012, 10:17 AM   #3293
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Originally Posted by eper View Post
my bad thats supposed to be pink. like i said when i was trying to post it i was extremely sick.
Ohh good. I was anyways going to try white first thanks!
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Old 12-11-2012, 10:20 AM   #3294
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Quote:
Originally Posted by pete48 View Post
Thanks for the PM's regarding the stickpack/MM config guys! I think I found a pretty elegant solution. Hopefully it will help anyone else with the same problem. I used the rear battery mount and slid it up against the posts in the rear. Sponge taped it to the chassis and everything fits perfectly.
one of the key features of the RB6 is it's super low center of gravity . i really don't think mounting your esc and receiver on top is going to help in any way . plus the car is heavy anyway.I run MM look at my chassis setup.
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Old 12-11-2012, 07:21 PM   #3295
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I've somewhat been following this car since it came out. I used to own a Rb5 WC and well... nothing compares to k-quality. I was wondering how agile is the rb6? Also is it durable? I would be running stock 17.5.
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Old 12-11-2012, 08:14 PM   #3296
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Originally Posted by umm winning View Post
I've somewhat been following this car since it came out. I used to own a Rb5 WC and well... nothing compares to k-quality. I was wondering how agile is the rb6? Also is it durable? I would be running stock 17.5.
I just got one for 17.5 racing, I love the car very agile and responsive, I run Shorty's not sure on stick. I've only broke a RF2 plate so far and I hit the pipe pretty hard but didn't even know it was broke and won the race. Just be sure to use the thicker Rf2 (had smaller one when broke). I herd the steering bar can break so im carrying a spare but so far so good, going to order a exotek if it breas. I've drove both B4.1 all the hop ups big bores, tlr 22 hopped up. My opinion is this car is amazing and drives like no other very smooth.
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Old 12-11-2012, 08:25 PM   #3297
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Default fan installed

here is a picture of the fan installed with the new battery holder . still has a great L.C.G . i don't need the fan just wanted to show you if you choose to try it .
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Old 12-11-2012, 08:58 PM   #3298
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Quote:
Originally Posted by fastestwon View Post
here is a picture of the fan installed with the new battery holder . still has a great L.C.G . i don't need the fan just wanted to show you if you choose to try it .
Did your turnigys come with the roar approved sticker already on them? Mine I just got say there approved but no stickers.
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Old 12-11-2012, 09:01 PM   #3299
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Did your turnigys come with the roar approved sticker already on them? Mine I just got say there approved but no stickers.
yes they came that way
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Old 12-11-2012, 09:25 PM   #3300
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Originally Posted by fastestwon View Post
here is a picture of the fan installed with the new battery holder . still has a great L.C.G . i don't need the fan just wanted to show you if you choose to try it .
I must be missing something as to why your going through all the trouble to use long ball cups cut off etc etc. My battery is setup like yours with the parts from the kit. The kit included parts to set it up just like that.
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