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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
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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 01-03-2013, 10:16 AM
  #3871  
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Revtech shorty is worth the money.. I just sold my shortie but thinking I should of kept it for a back up. I just got a WTS Orion 90c but cant really tell about the performance due to running mod but... I'm pretty sure its up there for those hot laps running in stock. Plus if you need the extra weight it can always be added.
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Old 01-03-2013, 10:36 AM
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Iv run a few different shorties and nothing I have tried comes close to my Fantom shorties (based off the revtech packs). Buy directly from Fantom.. they are actually cheaper than revtech labeled packs. At 4500mah, you get a nice pile of mah in the shorty.... they maintain voltage EXTREMELY well.

Here is the strange part. I was worried that the high MAH of the Fantom shorty would make it still a bit too heavy (I have a specific weight goal for the fatty RB6)... But I weighed my Fantom 4500 shorty against my 1.5 year old losi excelorin shorty which is a 3800, and my Fantom pack is ONE gram heavier. Figure that one out

I have two of these...worth every penny:

http://www.fantomracing.com/proddeta...?prod=FAN26192
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Old 01-03-2013, 10:38 AM
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Originally Posted by TT_Vert View Post
I'm in the process of testing these. I've created a jig and am making a spreadsheet. I'm going to be testing a friends avid springs along w/ xgear and losis that I've personally got. From my testing I can tell you thus far that the advertised spring rate between the xgear springs is very small and lower that advertised. The TLR were nearly dead on. I'm only testing at 1/2" and 1" compression, repeating 3 times and averaging them.

Dave
I will be curious to see your findings vs. this spring chart. Yes, the KYO springs are quite a bit different than the advertised rate (according to this chart).

http://www.petitrc.com/reglages/BuggyBigBoreSpring.pdf
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Old 01-03-2013, 10:38 AM
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Originally Posted by mizzle View Post
Do you think they are milling chassis for weight or for flex?
That picture is a pre-production prototype chassis.
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Old 01-03-2013, 10:40 AM
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Originally Posted by TT_Vert View Post
From my testing I can tell you thus far that the advertised spring rate between the xgear springs is very small and lower that advertised.
I don't think the Xgear springs actually have an advertised spring rate... somebody like yourself made a testing rig and just posted his numbers... According to Xgear/Kyosho, their advertised rates are just "soft, medium soft, medium.." etc.
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Old 01-03-2013, 10:48 AM
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Originally Posted by Posvar View Post
Are the orion shorty packs even available? I have a new WTS I want to sell and get the shorty.
speedtechrc..
http://www.speedtechhobbies.com/inde...roduct_id=2638
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Old 01-03-2013, 10:53 AM
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They don't have them yet......
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Old 01-03-2013, 11:10 AM
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Originally Posted by Posvar View Post
They don't have them yet......
i just shot them an email as to when they'll be available.. however i'm assuming it'd be soon because the Peak ver. are in stock now

http://www.speedtechhobbies.com/inde...roduct_id=4039
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Old 01-03-2013, 11:43 AM
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Many racers at West Coast have the Orion shorties...They are already sold out. There are more coming soon.
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Old 01-03-2013, 11:59 AM
  #3880  
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Originally Posted by t8rtot View Post
I got one of these from Speedtech right after Thanksgiving. Very happy with the performance.
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Old 01-03-2013, 01:15 PM
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are these the correct parts to put the "old" rb5 front axles on the RB6?

KYOLAW30GM Kyosho Aluminum Clamping Wheel Hubs Gunmetal
KYOUM506 Kyosho Front Wheel Shafts
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Old 01-03-2013, 01:37 PM
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having trouble finding replacement shock o-rings online - are they the same as the associated o-rings? what do you guys use?

also, I cant find the part numbers for the shock ends (different lengths) and the little bushings that fit in them for the RB6

Thank you
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Old 01-03-2013, 01:51 PM
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Originally Posted by ChadBlanton View Post
having trouble finding replacement shock o-rings online - are they the same as the associated o-rings? what do you guys use?

also, I cant find the part numbers for the shock ends (different lengths) and the little bushings that fit in them for the RB6

Thank you
No they are not. Get the xrings if you dont find the o rings they are just as good but get Kyosho.
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Old 01-03-2013, 01:54 PM
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Originally Posted by KSimmonds View Post
I got one of these from Speedtech right after Thanksgiving. Very happy with the performance.
Maybe they will be in soon.
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Old 01-03-2013, 01:58 PM
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Originally Posted by Posvar View Post
Maybe they will be in soon.
no they wont Jeff at SpeedTech says March 8th.. however they are rolling out there own line of 4000 Mah 70c batts at a good price.
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