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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 05-10-2015, 01:52 PM   #11986
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[QUOTE=Jpdanger;13986441]I dremeled the chassis sides flush and cut the sideguards so the battery can lie flat on the chassis and fit underneath the hold down brace. Otherwise, people use double sided tape, tape around the battery and chassis, or shim up the hold down brace and shelf (if you aren't going to dremel the sides of the chassis). I've even seen someone cut slits in the sideguards and use velcro straps.

There are so many tuning options for this car that the old saying "There are many ways to skin a cat" rings true. I've found sideways gives me more rear traction at the expense of steering because the battery CoG is further rearward than inline. If you're willing to cut up your car, the sideways option offers more weight tuning options since you're able to move the battery more forward/rearward whereas inline is limited to a couple inches by the motor or servo.

I hav not done it on my car, but on a friends car I did not like how it flung the rear around, and the lose of steering hindered me on smallish tight tracks. My wiring is perfect with my speed control behind the battery.
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Old 05-10-2015, 03:10 PM   #11987
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Put the brass on the front and the car gets really good.
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Old 05-12-2015, 07:51 PM   #11988
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Speaking of the front, JTP RC just put up a reworked front shock tower. This explains Tebo's use of long shock ends up front. Even though I just picked up an RB6 from a buddy this has me thinking it may work well on my home track.
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Old 05-12-2015, 09:44 PM   #11989
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Quote:
Originally Posted by GIHOSU View Post
Speaking of the front, JTP RC just put up a reworked front shock tower. This explains Tebo's use of long shock ends up front. Even though I just picked up an RB6 from a buddy this has me thinking it may work well on my home track.
Link please! I didn't see anything on a new shock tower. Jared does reference using an older tower from an earlier version of the RB6. I would guess the longer ends are used since the shocks may be too short for the tower.
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Old 05-13-2015, 08:14 AM   #11990
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Originally Posted by Jpdanger View Post
Link please! I didn't see anything on a new shock tower. Jared does reference using an older tower from an earlier version of the RB6. I would guess the longer ends are used since the shocks may be too short for the tower.
http://jtprc.bigcartel.com/product/r...on-front-tower
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Old 05-13-2015, 09:10 PM   #11991
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Hmmm I just ordered one, so I'll let you what think.
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Old 05-14-2015, 10:51 AM   #11992
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Quote:
Originally Posted by K_King View Post
I tried the gear diff today, all machined internals, with the new cover. Felt really good tonight, didnt seem to drive any differently except it felt like it had more forward drive. Low speed felt fine and the high speed was pretty smooth as well.
King help me with this.im new to 2wd im running fully converted rtr to mid motor except the chassis and gear diff. Using 7.5t lrp with tebo 15 reedy setup.i put 3k in diff and this thing just does donuts, can't even make it down the straight. ?adjusting the slipper is where I'm confused because it's gear not ball diff.is it the same test, front wheels lift or since we're fix gear we have to do different? Please help me understand
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Old 05-14-2015, 12:51 PM   #11993
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Does anyone know what the SP motor plate weighs compared to the stock motor plate? I race mod buggy, and prefer a heavier car. thanks guys.
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Old 05-14-2015, 02:56 PM   #11994
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v2 version, 34301 seems like a new verision of the RB6 is soon out, BUT i downloaded the manual and the only upgrade are the new rear arms with 3 holes.

Or did I miss any? I was hoping new sideguards to try shorty sideways too

http://www.kyosho.com/jpn/support/in...IMA_RB6_IM.pdf

edit: Topmount of shocks seems to have got at flanged ball insted of the "just ball"
edit2: Gold rear springs too
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Last edited by Heda; 05-14-2015 at 03:31 PM.
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Old 05-14-2015, 03:35 PM   #11995
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Originally Posted by Jpdanger View Post
Hmmm I just ordered one, so I'll let you what think.
I get mine tomorrow.
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Old 05-14-2015, 03:44 PM   #11996
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Quote:
Originally Posted by Heda View Post
v2 version, 34301 seems like a new verision of the RB6 is soon out, BUT i downloaded the manual and the only upgrade are the new rear arms with 3 holes.

Or did I miss any? I was hoping new sideguards to try shorty sideways too

http://www.kyosho.com/jpn/support/in...IMA_RB6_IM.pdf

edit: Topmount of shocks seems to have got at flanged ball insted of the "just ball"
edit2: Gold rear springs too
Yes. That's been updated which means kits probably will be as well. As for calling it anything else then an RB6 I doubt. What I would like to see as well is a flat chassis, and side guards that allow both configs without having to mill out the chassis.
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Old 05-14-2015, 03:46 PM   #11997
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Does anyone know what the SP motor plate weighs compared to the stock motor plate? I race mod buggy, and prefer a heavier car. thanks guys.
Think it's 3 grams lighter then standard.
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Old 05-16-2015, 05:12 PM   #11998
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Which shock tool is everyone using besides the one that comes in the box?
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Old 05-16-2015, 05:55 PM   #11999
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Quote:
Originally Posted by cooper126 View Post
Which shock tool is everyone using besides the one that comes in the box?
This:
http://www.avidrc.com/product/5/acce...cessories.html

Use it to loosen only. Use finger pressure to tighten the seal cartridge.
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Old 05-19-2015, 07:01 PM   #12000
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Just picked up a used RB6 that is supposed to be here on time to race Saturday. All we've ever raced is SCT so all I have is standard stick batteries.
Will they fit in a mid motor setup or do I need to find some shortys?

I plan to run shortys or something else but I'm just wanting to get through the weekend until I figure out what I want.
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