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Kyosho Ultima RB6 & RB6.6 Car Thread

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Old 12-21-2016, 08:46 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Kyosho Ultima RB6 & RB6.6 Car Thread
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
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 07-25-2013, 04:58 PM
  #7681  
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was just curious and weighed my car tonight. 1605 g with out the transponder. That's with a shorty and every aluminum option that kyosho makes. Not too bad with all that aluminum.
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Old 07-25-2013, 05:13 PM
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Originally Posted by skengines
What gearing do you guys recommend for a 10.5 motor?
Start at 76/26, should be in the ballpark +\~ a tooth on the pinion.
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Old 07-25-2013, 05:30 PM
  #7683  
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Originally Posted by desertracerdad
Start at 76/26, should be in the ballpark +\~ a tooth on the pinion.
Thank you sir.

Were you at the Shootout this past weekend? Saw a couple RB6s in Stock, Super stock and mod.
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Old 07-27-2013, 11:54 AM
  #7684  
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Are people running weight under the steering rack or on top of their servo? i remembered today on my rb5 i had a couple lead pieces stashed on top of my front bulkhead and want to know if that is a common placement for weight on the 6? I also asked a few pages back about getting my mid motor to be more responsive in a switch back section and putting the screws back into my side pods was a suggestion, but it only slightly helped out. Any other suggestions?

EDIT: Maybe these could help me out?
http://www.amainhobbies.com/product_...-Set-Mid-Motor

Last edited by ColbyRichards; 07-27-2013 at 01:04 PM. Reason: added link to sway bars
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Old 07-27-2013, 01:12 PM
  #7685  
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Originally Posted by skengines
Thank you sir.

Were you at the Shootout this past weekend? Saw a couple RB6s in Stock, Super stock and mod.
I was at the shootout, I saw a lot of RB6's in the stock class not many in SS.
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Old 07-28-2013, 12:18 AM
  #7686  
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Originally Posted by Team G Racing
I was at the shootout, I saw a lot of RB6's in the stock class not many in SS.
Yea not as many as 17.5, in 13.5 three RB6's made the A-Main (2 mid motor, and 1 rear motor) along with five B4.2's, and two 22's. If memory servers me right, there was three RB6's in the B-Main (All rear motor).
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Old 07-28-2013, 03:13 AM
  #7687  
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Anyone care to explain how to use these adjustable inserts?

Outb/Outb is 3.0 wide but outc/outc also is 3.0 wide.
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Old 07-28-2013, 03:25 AM
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Would the Proline velocity wheels be a direct fit with same offsets?
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Old 07-28-2013, 03:54 AM
  #7689  
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Originally Posted by gelshocker
I think the whole purpose of the king pin set for the rb6 is for the 4 bushings. C'mon Kyosho release some delrin steering bushings already
I think the bushings r a big problem! that needs to be delt with. delrin will fix it.
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Old 07-28-2013, 04:24 AM
  #7690  
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Hello
Trying to decide between RB6 and B4.2, I mainly run stock 17.5. My main concern with RB6 is the weight difference between RB6 and B4.2? Is the RB6 too heavy for stock?
Thanks for any info
idbdoug
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Old 07-28-2013, 05:35 AM
  #7691  
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Originally Posted by idbdoug
Hello
Trying to decide between RB6 and B4.2, I mainly run stock 17.5. My main concern with RB6 is the weight difference between RB6 and B4.2? Is the RB6 too heavy for stock?
Thanks for any info
idbdoug
Definitely not, car is very good in stock.
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Old 07-28-2013, 05:48 AM
  #7692  
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Hello
Trying to decide between RB6 and B4.2, I mainly run stock 17.5. My main concern with RB6 is the weight difference between RB6 and B4.2? Is the RB6 too heavy for stock?
Thanks for any info
idbdoug
You can get down around 1550g easy enough with a shorty pack
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Old 07-28-2013, 05:50 AM
  #7693  
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I ran a 10.5 for the first time on this car, we run slicks and the car was pulling wheelies all over the place. I put 60g up front through out the night, but didn't help enough. Would less squat decrease rear weight transfer? I have the shorty almost all the way forward already.
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Old 07-28-2013, 07:20 AM
  #7694  
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Originally Posted by MikeXray
I ran a 10.5 for the first time on this car, we run slicks and the car was pulling wheelies all over the place. I put 60g up front through out the night, but didn't help enough. Would less squat decrease rear weight transfer? I have the shorty almost all the way forward already.
More anti squat will make less weight transfer. I would leave anti alone and adjust droop and springs. Less front droop stiffer rear spring
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Old 07-28-2013, 07:22 AM
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Originally Posted by Jason.Dias
Yea not as many as 17.5, in 13.5 three RB6's made the A-Main (2 mid motor, and 1 rear motor) along with five B4.2's, and two 22's. If memory servers me right, there was three RB6's in the B-Main (All rear motor).

In the B-Main there was 3, 2 in RM and 1 in MM.
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