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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 10-10-2012, 10:10 AM   #1336
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Originally Posted by Jason.Dias View Post
Did you get an RB6 Kevin?
Yes....its on its way... may have it built by Sunday.
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Old 10-10-2012, 11:57 AM   #1337
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I love to hate building shocks.
FYI,Page 28
#42
161 is 163 small "o" ring

everyone got TWO (2) supplemental sheets?
whats with the servo saver shave? rubbn' some where? any other style or type to use ? does it make it weaker?
just curious.
ems
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Old 10-10-2012, 12:12 PM   #1338
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Originally Posted by Eric Summers View Post
I love to hate building shocks.
FYI,Page 28
#42
161 is 163 small "o" ring

everyone got TWO (2) supplemental sheets?
whats with the servo saver shave? rubbn' some where? any other style or type to use ? does it make it weaker?
just curious.
ems
Iv built my kyosho shocks so many hundreds of times, I never even looked at the manual.

i did see where a trim is required to the upper bulkhead brace piece, but not the servo saver (the car doesn't have one). I just used my x-acto to shave off a mm or so so the steering rack clears properly. It looked like it was going to clear all by itself, but it only took 30 seconds so i just went ahead and did it.
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Old 10-10-2012, 12:22 PM   #1339
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My plans for the battery holddown with screw down are simple:

1. Obtain gun metal nuts(on the way )
2. Measure and cut post to length using a precision light saber
3. Cut the head of a screw off that is long enough
4. Drill a hole to size for the screw to thread into the post
5. double nut the screw and thread it into the post inserting the cut off head side first so the good end of the screw will be sticking up.

Viola screw downs complete. You could make it easier if you had some long grub screws, but I don't so I'll just cut a screw...
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Old 10-10-2012, 12:25 PM   #1340
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Originally Posted by Jason.Dias View Post
Yea running stock, but lap time wise I am pretty close to the mod lap times, just harder to do those really fast laps back to back with traffic and battling.

http://mobile.liverc.com/results/?d=...T_(A_Main).xml
http://mobile.liverc.com/results/?d=...K_BUGGY_NT.xml

I am running the rb6 rear arms flipped to the 1 hole side. If you're using the stock pistons, I would run 37.5f 32.5r.
Yeah I ran the 1 hole to start. Im going to the track here in a bit when it opens. I suppose I can change the oil now and see how it does.

So stock setup based on the manual with that oil and 1 hole?
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Old 10-10-2012, 12:30 PM   #1341
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To Capt. America,
it was a 4x5 sheet accompanied with the other supp sheet, i believe the servo arm not a saver my mistake Page 13 #5.
yes i saw the front upper plate
supp sheet.
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Old 10-10-2012, 12:32 PM   #1342
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ok i got to ask, what are Grub screws?
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Old 10-10-2012, 12:34 PM   #1343
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Quote:
Originally Posted by Eric Summers View Post
ok i got to ask, what are Grub screws?
different name for set screw.
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Old 10-10-2012, 12:38 PM   #1344
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How are people liking the at with a shorty? Or does everyone like long?
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Old 10-10-2012, 12:41 PM   #1345
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Yeah, what he said? ^^^
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Old 10-10-2012, 12:49 PM   #1346
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Quote:
Originally Posted by Eric Summers View Post
To Capt. America,
it was a 4x5 sheet accompanied with the other supp sheet, i believe the servo arm not a saver my mistake Page 13 #5.
yes i saw the front upper plate
supp sheet.
Modify Madness
but fun as can be.
hhmm.. I guess I overlooked that (i did get a small insert like that). I didn't see anything about shaving the servo horn... Mine doesn't hit anywhere though.
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Old 10-10-2012, 12:54 PM   #1347
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it was a small (i say shave ) on one side of the ball cup sides
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Old 10-10-2012, 02:51 PM   #1348
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Quote:
Originally Posted by bigwavedave33 View Post
My plans for the battery holddown with screw down are simple:

1. Obtain gun metal nuts(on the way )
2. Measure and cut post to length using a precision light saber
3. Cut the head of a screw off that is long enough
4. Drill a hole to size for the screw to thread into the post
5. double nut the screw and thread it into the post inserting the cut off head side first so the good end of the screw will be sticking up.

Viola screw downs complete. You could make it easier if you had some long grub screws, but I don't so I'll just cut a screw...
What is the purpose of this?
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Old 10-10-2012, 02:58 PM   #1349
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Originally Posted by Cpt.America View Post
hhmm.. I guess I overlooked that (i did get a small insert like that). I didn't see anything about shaving the servo horn... Mine doesn't hit anywhere though.
there was an amendment page in there, i'm having no issues.

what is the smallest KYO spur i can buy, or what is the recommended gearing for 17.5 non-boosted?

thank you
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Old 10-10-2012, 03:00 PM   #1350
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there was an amendment page in there, i'm having no issues.

what is the smallest KYO spur i can buy, or what is the recommended gearing for 17.5 non-boosted?

thank you
Personally, I don't like the kyosho spurs because they are a tad noisy. I am a HUGE fan of the Kimbrough spur gears, and run nothing else. All you need are standard AE slipper pads and a Kimbrough spur, and you are set. Nothing is as quiet, or as true/round.

With a revtech based motor with the endbell timing cranked, I run 31/69 on an 90f x 50f indoor clay track.

http://www.fantomracing.com/proddeta...prod=FAN27917S

http://www.amainhobbies.com/product_...ipper-Gear-69T

http://www.amainhobbies.com/product_...pper-Pad-B4-T4

(edit: I know this doesn't actually answer your question, its just my suggestion as I don't run K spurs )
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Last edited by Cpt.America; 10-10-2012 at 03:20 PM.
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