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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 05-17-2013, 05:41 AM
  #6841  
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Originally Posted by aloksatoor View Post
No use the delrin ones. The stocks are only good for plastic.
Thanks. Found them.
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Old 05-17-2013, 07:55 AM
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Originally Posted by Chris-s View Post
Good place to start: http://www.petitrc.com/setup/kyosho/...stone20130209/

Its astroturf, but grip levels are more similar to carpet.
I added stiffer springs as well. Worked for me on carpet/mid motor.
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Old 05-17-2013, 08:35 AM
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Can anyone recommend a gearing for a 10.5 motor? I'm thinking 75/21....
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Old 05-17-2013, 08:59 AM
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Originally Posted by carbons2k View Post
Can anyone recommend a gearing for a 10.5 motor? I'm thinking 75/21....
I was running 23/75 with the tekin gen2 with stock timing. I was running at about 125 deg on my local outdoor 8th scale track and about 135 indoors on hard damp clay.
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Old 05-17-2013, 09:32 AM
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Originally Posted by carbons2k View Post
Can anyone recommend a gearing for a 10.5 motor? I'm thinking 75/21....
I have 26/75 right now with a viper motor. still runs cool and is fast! When I was running a novak motor I would run 24/75.
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Old 05-17-2013, 11:57 AM
  #6846  
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it's the same internal as the AE, and with that I would have run 25/81 with a 10.5, so that translates over to 23/75.
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Old 05-18-2013, 05:27 AM
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I've gotta say... I'm kinda disappointed in this car. I've had it since the week it came out and without and exaduration I think I've gone thru 15 steering racks. The car was advertised with an aluminum part and was produced with plastic. I mean even the AE 4.2 came with an aluminum rack. (And hubs for that matter) I just feel like we were short changed with the rack. Seems real brittle and I've broken it with the slightest touch. I dunno... Anyone else feel this way?
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Old 05-18-2013, 06:19 AM
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get the exotek alum one. Its a very good car, but it has a few weak spots. exotek makes quality parts and the price is decent. Yaiba is releasing some good parts as well for the rb6.
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Old 05-18-2013, 07:07 AM
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Originally Posted by carbons2k View Post
I've gotta say... I'm kinda disappointed in this car. I've had it since the week it came out and without and exaduration I think I've gone thru 15 steering racks. The car was advertised with an aluminum part and was produced with plastic. I mean even the AE 4.2 came with an aluminum rack. (And hubs for that matter) I just feel like we were short changed with the rack. Seems real brittle and I've broken it with the slightest touch. I dunno... Anyone else feel this way?
I went through a couple months last year when I was breaking all kinds of stuff.... in my case it was because of a nasty track that I could not tame, and just plain dumb luck. Then as quick as it started it went away.... didn't break anything for months. I did add a couple Alu pieces along the way. Maybe get the alu rack and just keep going.
More importantly does the car work for you. Thats something to be concened with.
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Old 05-18-2013, 07:52 AM
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Originally Posted by carbons2k View Post
I've gotta say... I'm kinda disappointed in this car. I've had it since the week it came out and without and exaduration I think I've gone thru 15 steering racks. The car was advertised with an aluminum part and was produced with plastic. I mean even the AE 4.2 came with an aluminum rack. (And hubs for that matter) I just feel like we were short changed with the rack. Seems real brittle and I've broken it with the slightest touch. I dunno... Anyone else feel this way?
Why would you keep buying the same part 15 times if you keep breaking it? After the first one, and reading about others breaking theirs, I bought the alum. version and never looked back.
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Old 05-18-2013, 08:22 AM
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^ this... The definition of insanity is...

and plz don't compare this car to the b4.. How long has it been out? Its taken 10yrs for the car to come with those hop-ups.. And tbh, I ran the car for 4mos and only upgraded the rack, the car was flawless. The car didn't need alum, that's all bling.
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Old 05-18-2013, 08:25 AM
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Originally Posted by CanyonCarverR1 View Post
Why would you keep buying the same part 15 times if you keep breaking it? After the first one, and reading about others breaking theirs, I bought the alum. version and never looked back.
LOL. Not to mention after "15 times", I'd at a minimum consider dialing down my car a bit and learn how to drive it before turning it back up. Like when I taught my son, "slower is faster". You're crashing hard and much more frequently than the bell curve if you've broken FIFTEEN of anything! My son probably broke 15 AE a-arms within a couple weeks last September, but he had just turned 9 and the B4.1 was his first RC "anything", and I showed up at the track, bought him a transponder, and through him feet (wheels) first right on the track.
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Old 05-18-2013, 08:48 AM
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Originally Posted by carbons2k View Post
I've gotta say... I'm kinda disappointed in this car. I've had it since the week it came out and without and exaduration I think I've gone thru 15 steering racks. The car was advertised with an aluminum part and was produced with plastic. I mean even the AE 4.2 came with an aluminum rack. (And hubs for that matter) I just feel like we were short changed with the rack. Seems real brittle and I've broken it with the slightest touch. I dunno... Anyone else feel this way?
Wreck much?

You're doing something wrong if you keep breaking, plus the same part over and over. I never broke the part, but I opted for the Kyosho one as thats what I had on my RB5 and prefer to not have to worry about it.

I would start there.
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Old 05-18-2013, 10:37 AM
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Originally Posted by K_King View Post
Wreck much?

You're doing something wrong if you keep breaking, plus the same part over and over. I never broke the part, but I opted for the Kyosho one as thats what I had on my RB5 and prefer to not have to worry about it.

I would start there.
I really don't tho. Last week I grazed a pipe and broke. After I fixed it I let someone use my car and he tumbled across 3 lanes and nothing broke. Last night someone smacked into me and it broke again. As for aluminum parts... I don't have any in any of my cars. Looks like time to upgrade I guess.
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Old 05-18-2013, 11:03 AM
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You are eventually gonna break a servo if you upgrade to the aluminum as well, unless something changes. This car does not have a servo saver. The stock part is not that weak. I never broke mine but just upgraded them for peace of mind. Only things I broke were in the winter season on really cold days (late 40s in early practice), 2 rear shock towers and 1 front C hub and 1 rear plastic hub (this was 1 3 months of almost weekly running 2 times).
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