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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 12-22-2013, 06:32 PM   #9106
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Originally Posted by Speedychris22 View Post
Kevin I was looking at your latest setup on petit Rc nd noticed your using different pistons, which brand are they?
Can't speak for Kevin, but I would bet they are drilled kyosho blanks. It is what most of the drivers are doing for pistons if they are not the standard 5 hole listed.
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Last edited by ovalracer1m; 12-22-2013 at 06:59 PM.
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Old 12-22-2013, 07:58 PM   #9107
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Finished mine.. still gots tape it down and break the diff in a bit more..

Tried a little something different and clean..
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Old 12-22-2013, 08:37 PM   #9108
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Originally Posted by Speedychris22 View Post
Kevin I was looking at your latest setup on petit Rc nd noticed your using different pistons, which brand are they?
You can run Losi 55s but I ran blank Kyosho drilled to 55. We now have predrilled pistons in the 4x1.3 and also 3x1.4 and 2x1.6 which provide more initial pack.

I've run both kinds and the 4x1.3s are the best all around for my track which is inconsistent. If you have a track with a lot of grip or pretty big jumps the other holes may help versus having to go up in oil.
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Old 12-22-2013, 09:29 PM   #9109
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Originally Posted by K_King View Post
You can run Losi 55s but I ran blank Kyosho drilled to 55. We now have predrilled pistons in the 4x1.3 and also 3x1.4 and 2x1.6 which provide more initial pack.

I've run both kinds and the 4x1.3s are the best all around for my track which is inconsistent. If you have a track with a lot of grip or pretty big jumps the other holes may help versus having to go up in oil.
I run at a track that has low traction with lots of bumps what do you think would work? Also when are these pistons coming out for the general public
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Old 12-22-2013, 09:33 PM   #9110
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If you can't wait for the Kyosho pistons, I know a lot of guys run GHEA pistons.

http://www.amainhobbies.com/product_...ns-4-4x13-Hole
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Old 12-22-2013, 11:11 PM   #9111
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If you can't wait for the Kyosho pistons, I know a lot of guys run GHEA pistons.

http://www.amainhobbies.com/product_...ns-4-4x13-Hole
Kyosho America has the new pistons available and I'm sure their distributors will as well.
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Old 12-22-2013, 11:49 PM   #9112
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Ran my mid motor today in stock class. I liked it a lot, but still curious how it would be in rear motor. Thinking of converting it this weekend.

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Old 12-23-2013, 02:22 AM   #9113
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I just finished my RB6 tonight too. This was my first Kyosho car and Ive gotta say this kit is pretty darn impressive. I am really excited to go run this thing.
Now I just need to paint up a body and mount up some tires.
I got the insipiration for the electronics layout from David Ronnefolk's car that I saw on Petit.
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Old 12-23-2013, 07:58 AM   #9114
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Originally Posted by jamesbernatchez View Post
Ran my mid motor today in stock class. I liked it a lot, but still curious how it would be in rear motor. Thinking of converting it this weekend.

James just drive mine, kyles or even paulos to get an idea. Paulos will be the worse one but if it fits your driving style better then yours then change to rear motor. Oh and mount both front tires the same direction.
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Old 12-23-2013, 11:23 AM   #9115
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I just bought the v2 0 aluminum rear hubs. Is everyone using the bigger option bearing or the smaller one?
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Old 12-23-2013, 12:08 PM   #9116
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bigger
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Old 12-23-2013, 08:38 PM   #9117
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bigger
thanks buddy.
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Old 12-23-2013, 08:41 PM   #9118
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Run the bigger bearings. They typically last longer and take more abuse from hits on the side wall
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Old 12-23-2013, 08:42 PM   #9119
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thanks buddy.
Smaller will work but they will eventually blow out. The amount of load that is transferred to the bearing on the metal hubs is a lot. I'd only run the small ones in stock where rolling resistance is more of a concern than durability.
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Old 12-24-2013, 04:44 AM   #9120
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Kevin what's ur thought on new chassis? Worthy upgrade?
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