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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 09-24-2016, 07:03 AM   #13726
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Originally Posted by JAE View Post
How's the traction in laydown form on this buggy? Any comparison to the xray, yokomo, or b6 laydowns? Want to know if I should be planning to take away weight in some places and needing to add in others once I get mine. thx
Lots!! Run the car twice so far.. First time out not so good as issues with electrics and a servo fail but second time out was much better!

Was running on high grip Astro in 3 gear laydown layout and was constantly trying to loose grip! The car has loads of drive, to help rotation I ran the gear diff and the only weight I had in it was the front brass hinge pin holder. The only other options were the ally rear hangers. Spent about 4 hours and have a good dry high grip set up

You won't be disappointed!
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Old 09-24-2016, 08:09 AM   #13727
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hey guys can you point me to post about updating an rb6 to a 6.6?
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Old 09-24-2016, 07:30 PM   #13728
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hey guys can you point me to post about updating an rb6 to a 6.6?
See Wiki above. Also put a post here
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Old 09-24-2016, 09:19 PM   #13729
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Looks like tebo ran his at surfcity at OcRC laydown with shocks in front. Can't seem to find that setup. Anyone have it or a laydown setup for med/high bite clay with shocks in front?

Thx

Quote:
Originally Posted by njc11 View Post
Lots!! Run the car twice so far.. First time out not so good as issues with electrics and a servo fail but second time out was much better!

Was running on high grip Astro in 3 gear laydown layout and was constantly trying to loose grip! The car has loads of drive, to help rotation I ran the gear diff and the only weight I had in it was the front brass hinge pin holder. The only other options were the ally rear hangers. Spent about 4 hours and have a good dry high grip set up

You won't be disappointed!
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Old 09-24-2016, 11:09 PM   #13730
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Originally Posted by JAE View Post
Looks like tebo ran his at surfcity at OcRC laydown with shocks in front. Can't seem to find that setup. Anyone have it or a laydown setup for med/high bite clay with shocks in front?

Thx
I'm running my rb6.6 with lay down 3 gear,with a little weight up front , 22 ride height, shocks in front , high bight clay , running a 7.0 motor car is dialed.
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Old 09-25-2016, 01:08 AM   #13731
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Thx! What springs? On paper Kyosho pink front is very soft and coupled with a gold rear seems different than what a lot of other manufacturers do with their spring setups out of the box.

What are good spring combos? For laydown


Quote:
Originally Posted by 534 View Post
I'm running my rb6.6 with lay down 3 gear,with a little weight up front , 22 ride height, shocks in front , high bight clay , running a 7.0 motor car is dialed.
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Old 09-25-2016, 07:44 AM   #13732
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Quote:
Originally Posted by JAE View Post
Thx! What springs? On paper Kyosho pink front is very soft and coupled with a gold rear seems different than what a lot of other manufacturers do with their spring setups out of the box.

What are good spring combos? For laydown
gold front and rear, the laydown configuration still has tons of rear grip...
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Old 09-25-2016, 12:56 PM   #13733
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Originally Posted by 534 View Post
I'm running my rb6.6 with lay down 3 gear,with a little weight up front , 22 ride height, shocks in front , high bight clay , running a 7.0 motor car is dialed.
What oil and Pistons are you running in your shocks??
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Old 09-25-2016, 04:20 PM   #13734
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Guys, I'm running 20.3mm shock length front shocks and stripped the piston shaft out of the eyelet (Long) twice this Friday. This happened to another guy also. Any ideas other than running a shorter shock length ?
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Old 09-25-2016, 06:13 PM   #13735
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Guys, I'm running 20.3mm shock length front shocks and stripped the piston shaft out of the eyelet (Long) twice this Friday. This happened to another guy also. Any ideas other than running a shorter shock length ?
Could someone please tell me what the spring rate is in lbs. for the pink kyosho big bore front springs?
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Old 09-25-2016, 06:50 PM   #13736
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Originally Posted by tobamiester View Post
Guys, I'm running 20.3mm shock length front shocks and stripped the piston shaft out of the eyelet (Long) twice this Friday. This happened to another guy also. Any ideas other than running a shorter shock length ?
What tower are you running?
It's my understanding that the Tebo tower is longer and takes away droop. The stock tower allows the same droop with more shaft in the eyelet. Kiddo and I run 20mm and rarely break one even as rough on equipment as we are.
Are you tapping the eyelet? I wouldn't do that either.
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Old 09-25-2016, 07:28 PM   #13737
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What tower are you running?
It's my understanding that the Tebo tower is longer and takes away droop. The stock tower allows the same droop with more shaft in the eyelet. Kiddo and I run 20mm and rarely break one even as rough on equipment as we are.
Are you tapping the eyelet? I wouldn't do that either.
Running Tebo's HRS setup (mostly) with stock tower. Not taping eyelet.
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Old 09-25-2016, 07:58 PM   #13738
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Running Tebo's HRS setup (mostly) with stock tower. Not taping eyelet.
Tebo is running Tebo towers so with stock towers you have more droop than he did.
Tire diameter also effects droop. What was his tire diameter? Do you measure droop and adjust shock length when you change tires?
Wish I could be more help. I'm not sure I'm good enough to feel .3mm of shock length, which is approximately the thickness of 4 human hairs or .012 of an inch. It's not much.
One old racing adage comes to mind.
To finish first, you must first finish.
Run that eyelet on there so it won't come off and find another adjustment to make it do what you want.

Or, do we need a longer front shock shaft? It's not super hard to make a front shaft from a rear. There are plenty of manufacturers that run the same diameter shaft if we could find one slightly longer.
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Old 09-26-2016, 03:19 AM   #13739
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Are u guys running shims tonr move droop?
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Old 09-26-2016, 03:31 AM   #13740
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Could someone please tell me what the spring rate is in lbs. for the pink kyosho big bore front springs?
site.petitrc.com/reglages/BuggyBigBoreSpring.pdf
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