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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 06-02-2013, 09:30 AM   #7051
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Originally Posted by Bob Barry View Post
I switched from 4.2 to RB6 and I love it. But make no mistake, you aren't going to switch from one to the other and get miraculously faster. I personally am quicker with the RB6, but I don't know how much of that can be attributed to the car or the track just getting better. I'm sure a bit of both.

anyway the build and quality are not even comparable. You can't really understand it until you have experienced it. RB6 just wins hands down.

Performance on the track: anything that my 4.2 did, the RB6 did better. It's incredibly stable, while maintaining that aggressive feel. I've tried several setups and each worked well. I can't say for certain which setup is the fastest yet, but again, I have less than 30 packs through the car.


That brings me to my question for the others. I noticed on most setup sheets, the anti-squat is left blank. does this mean you guys are all running with no shims under both the front and rear hangers? I tried adding a 1mm shim under the front hanger but didn't get a real chance to see how I liked it as I broke after a few laps.
I did have a shim under the RF hanger. I believe a 0.5 = 1 degree antisquat. I used to run in the rb5 with that for more steering on power. In the 6 I never felt a need. I did run it with the 6 chassis once but did not like it for outdoors (indoors it was a bit better). I prefer the stock setup better, and use droop instead now to control the amount of weight transfer front and back.
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Old 06-02-2013, 09:33 AM   #7052
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The XB4 knows how wings should mount.

Thats one of the worst designs actually for me. I have broken a total of 4 xray wing mounts (the part behind the screw threads), the tabs stick out too much at the rear, theres no flex at all and the lexan wings too stifff as well. So basically the wing wins over the mount always. I personally found the older schumacher mount with the orings a really good one. Never broke a wing as well as a mount but it was a bit tricky to replace wings. http://www.amainhobbies.com/product_...oad-Wing-Mount
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Old 06-02-2013, 09:37 AM   #7053
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Originally Posted by aloksatoor View Post
I did have a shim under the RF hanger. I believe a 0.5 = 1 degree antisquat. I used to run in the rb5 with that for more steering on power. In the 6 I never felt a need. I did run it with the 6 chassis once but did not like it for outdoors (indoors it was a bit better). I prefer the stock setup better, and use droop instead now to control the amount of weight transfer front and back.
ok cool. So how much anti is built in if you use no shims and alum hangers?
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Old 06-02-2013, 05:05 PM   #7054
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ok cool. So how much anti is built in if you use no shims and alum hangers?
There's a team driver at my track and he told me to remove the shims and run them flat on chassis for better forward bite
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Old 06-02-2013, 05:07 PM   #7055
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Most of you guys running wide or short rear hinge pin holders
-wanting to pick up alum ones so wanting to make sure I grab the right ones and the zx5 plastic bushings so no metal on metal
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Old 06-02-2013, 05:13 PM   #7056
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Originally Posted by Mxer59 View Post
Most of you guys running wide or short rear hinge pin holders
-wanting to pick up alum ones so wanting to make sure I grab the right ones and the zx5 plastic bushings so no metal on metal
I'm liking the wide so far everywhere.
http://www.exotekracing.com/kyosho/
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Old 06-02-2013, 05:27 PM   #7057
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Originally Posted by Mxer59 View Post
Most of you guys running wide or short rear hinge pin holders
-wanting to pick up alum ones so wanting to make sure I grab the right ones and the zx5 plastic bushings so no metal on metal
It seems to be different for everyone. I really like the narrow holders. Try both of the plastic holders and see which one one like more.
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Old 06-02-2013, 06:19 PM   #7058
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Do you guys have a part number for the bushings that go in hangers once you run alum?
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Old 06-02-2013, 06:27 PM   #7059
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Do you guys have a part number for the bushings that go in hangers once you run alum?
KYOLAW32
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Old 06-02-2013, 07:24 PM   #7060
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Originally Posted by moto44 View Post
Just sold my B4.1 and was going to pick up a B4.2 kit to build for the fall. I was thinking of maybe giving the RB6 a shot. Any body make the jump and how do the two cars compare? Thanks
Made the switch... Not going back. This platform is superior!
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Old 06-02-2013, 08:11 PM   #7061
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Any aftermarket washers that I can purchase. Need a lot .5 mm
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Old 06-02-2013, 08:21 PM   #7062
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Any aftermarket washers that I can purchase. Need a lot .5 mm
Avid came out with some. Check them out.
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Old 06-02-2013, 11:34 PM   #7063
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anyone making Red washers anymore?
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Old 06-02-2013, 11:38 PM   #7064
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ok cool. So how much anti is built in if you use no shims and alum hangers?
2 degrees.
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Old 06-03-2013, 12:08 AM   #7065
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Top racing...an on road company has them
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