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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 12-12-2013, 09:29 AM   #8926
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Originally Posted by nickdawg18 View Post
I have my tekin esc mounted exactly like you do. Do you have a problem with the stock body rubbing the capacitor?
Why not mount it on the chassis, directly below where you have it?
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Old 12-12-2013, 09:55 AM   #8927
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Kit is on its way Excited!

Curious what pinion you guys think I should match up with a 6.5T motor? A little overkill no doubt for indoor carpet racing, but it's what I've got to use pulled from the Yokomo I have in my signature.

Would I be ok with an 18 tooth, or should I be running something more like a 20/21/22? I'll probably turn down my end point a bit on the throttle since they are fairly tight technical tracks and by all means not large.
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Old 12-12-2013, 12:02 PM   #8928
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I run 21/78 on my orion 6.5 high grip astro
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Old 12-12-2013, 12:31 PM   #8929
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Quote:
Originally Posted by nickdawg18 View Post
I have my tekin esc mounted exactly like you do. Do you have a problem with the stock body rubbing the capacitor?
Slightly. My battery wires sit a bit higher than the capacitor so they hit, but press into the capacitor. I'm not too worries about it. It's an odd spot to land on if I flip.

Quote:
Originally Posted by CanyonCarverR1 View Post
Why not mount it on the chassis, directly below where you have it?
My RS wouldn't fit with my shorty pack setup. I decided to put the receiver under there instead.
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Old 12-12-2013, 04:23 PM   #8930
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Originally Posted by nickdawg18 View Post
I'm running on a carpet track, mid motor, shorty. When I would go into a fast turn the body would roll hard. I never lost traction but I'm sure the inside wheels were close to coming off the track. A lower roll center would help fight this?
Hey buddy..... Here is a few things to try and see if it works for ya. I think if the car is rolling too fast/hard...

1.) Go up on shock oil.
2.) Another way to change the way the car rolls is to play with ballstud spacers. Go down on the inner and you get the car to have less roll. Or go up on the outside washers. Good for high bite stuff.
3.) if it's the rear, try the flat arms.
4.) Stand the shocks up more vertical. (probably a last resort).

See if any of those help.
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Old 12-12-2013, 05:54 PM   #8931
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With an RB6 on the way and a semi-large race coming up quickly after delivery I need to go ahead and order some spares/ setup upgrades without getting my hands on the car first. Any help on what I should order would be appreciated. Planning on running mid motor. Indoor/Medium Traction/Clay track
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Old 12-12-2013, 06:22 PM   #8932
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my build is almost done and im just re checking everything before i put my electronics on....

i been reading when this buggy came out like a year now it had minor issues but now fixed.. my question is do i still have to trim the front bulkhead for the steering rack so it dont bind while turning side to side? i looked at it and it seems fine.. did they fix this also?
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Old 12-12-2013, 06:59 PM   #8933
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Quote:
Originally Posted by iMarky View Post
my build is almost done and im just re checking everything before i put my electronics on....

i been reading when this buggy came out like a year now it had minor issues but now fixed.. my question is do i still have to trim the front bulkhead for the steering rack so it dont bind while turning side to side? i looked at it and it seems fine.. did they fix this also?
Hi, Not sure in the latest model, but as far as i know you still need to trim a bit.

Install the servo, put it in position and see if you have enough clearance.

Ciao,
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Old 12-12-2013, 07:19 PM   #8934
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Quote:
Originally Posted by Zak Crider View Post
With an RB6 on the way and a semi-large race coming up quickly after delivery I need to go ahead and order some spares/ setup upgrades without getting my hands on the car first. Any help on what I should order would be appreciated. Planning on running mid motor. Indoor/Medium Traction/Clay track
Not much, this has been coverd 50x times already, but you'll want an alum steering rack, Kyosho, yaiba and exotek all make them. Many run the RB5 UM521 or 521-1 arms, alum rear hubs are nice, and alum rear hingepin holders, again a few options, Kyo now makes the set with inserts for more options, other wise they have RF/RF2 sets as well as yaiba and exotek's stuff.
I have the plastic bulkhead as spares, c hubs and arms, but have not actually broken them yet, I wore out a set of front arms, still not broken.

Might want to pick up losi 55 pistons, or ghea 4x1.3mm or similar, I never liked the stock pistons.
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Last edited by MikeXray; 12-12-2013 at 09:19 PM.
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Old 12-12-2013, 07:24 PM   #8935
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Quote:
Originally Posted by sir_thomas View Post
Hey buddy..... Here is a few things to try and see if it works for ya. I think if the car is rolling too fast/hard...

1.) Go up on shock oil.
2.) Another way to change the way the car rolls is to play with ballstud spacers. Go down on the inner and you get the car to have less roll. Or go up on the outside washers. Good for high bite stuff.
3.) if it's the rear, try the flat arms.
4.) Stand the shocks up more vertical. (probably a last resort).

See if any of those help.
Thanks man. I'll try the ball stud spacers under the outter ball studs and go from there.
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Old 12-12-2013, 10:38 PM   #8936
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Thanks man. I'll try the ball stud spacers under the outter ball studs and go from there.
Nick what piston and oil are you running?
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Old 12-13-2013, 08:01 AM   #8937
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Whats up Nick, hows racing going at SmacTrac?

Hey guys, what up in K-land!! I Sold all my gear not long ago due to a hectic work schedule and now I have no gear left and some racedays off.......Im not wanting to go all out like in the past, just play around some at the track on club days.....I been checking out the rb6 RTR coming out soon for $300......what do u guys think about it for $300?
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Old 12-13-2013, 10:14 AM   #8938
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Quote:
Originally Posted by sir_thomas View Post
Nick what piston and oil are you running?
i'm running the stock pistons with 30f 25r losi oils.


Quote:
Originally Posted by Trevor Williams View Post
Whats up Nick, hows racing going at SmacTrac?

Hey guys, what up in K-land!! I Sold all my gear not long ago due to a hectic work schedule and now I have no gear left and some racedays off.......Im not wanting to go all out like in the past, just play around some at the track on club days.....I been checking out the rb6 RTR coming out soon for $300......what do u guys think about it for $300?
hey trevor. I havnt made it out to smak yet at all this year. I race indoor carpet on saturdays out at jakes race place. I'm going to try to make it out there thursday nights once my holiday schedule at work slows down a little bit. I'm actually heading out to blaze later today to pick up a few parts and some clay tires.
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Old 12-13-2013, 11:22 AM   #8939
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I felt the stock pistons didn't have enough pack. I think a lot of guy run the GHEA 4x1.3 pistons.

I have an extra set of AE 4X1.3 pistons if you're interested nickdawg.
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Old 12-13-2013, 12:52 PM   #8940
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Quick tip for anyone using the RB5 UM521 arms, I didn't have a set of rb5 pins for the outer hingepins and had seen others reuse the 6 ones, I also didn't have a 3mm drill bit, but I was able to ream out the captured end very easily, it's apparently not very thick, and the pin now went all of the way through.
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