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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 07-04-2014, 12:00 AM   #10561
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To much flex is a bad thing. The chassis will snap back violently. And you can make minimum weight with the stock chassis in mm with out doing anything crazy with upgrades.
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Old 07-04-2014, 10:06 AM   #10562
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Correct, I had a buddy with a Tamiya that was fighting that. He ended up making a CF brace for the entire chassis.
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Old 07-04-2014, 02:31 PM   #10563
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Does anyone have a bearing size and quantity for the rb6? Looking to maybe go with all ceramic bearings....
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Old 07-04-2014, 04:19 PM   #10564
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Quote:
Originally Posted by carbons2k View Post
Does anyone have a bearing size and quantity for the rb6? Looking to maybe go with all ceramic bearings....
Go on Avid's website and u can choose which bearings u want for the rb6, which in turn will give u the sizes needed.
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Old 07-04-2014, 05:04 PM   #10565
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Quote:
Originally Posted by Holmberg418 View Post
To much flex is a bad thing. The chassis will snap back violently. And you can make minimum weight with the stock chassis in mm with out doing anything crazy with upgrades.
Quote:
Originally Posted by K_King View Post
Correct, I had a buddy with a Tamiya that was fighting that. He ended up making a CF brace for the entire chassis.
either of you guys try running the standard chassis without the chassis brace? not just removing the screws but completely taken the brace off? I tried it and I had a ton of side bite but then the car became a diving board. sometimes awesome and sometimes not. I'm curious if this is the same sort of result.
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Old 07-04-2014, 06:08 PM   #10566
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either of you guys try running the standard chassis without the chassis brace? not just removing the screws but completely taken the brace off? I tried it and I had a ton of side bite but then the car became a diving board. sometimes awesome and sometimes not. I'm curious if this is the same sort of result.
I have completely taken the brace off. I liked it a lot but like you said it dived in to the corner. But it gives lots of side grip. Works well with dirt webs!
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Old 07-04-2014, 06:36 PM   #10567
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Quote:
Originally Posted by cnelson3 View Post
either of you guys try running the standard chassis without the chassis brace? not just removing the screws but completely taken the brace off? I tried it and I had a ton of side bite but then the car became a diving board. sometimes awesome and sometimes not. I'm curious if this is the same sort of result.
No just taking the bottom screws out for me.
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Old 07-06-2014, 05:32 AM   #10568
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Just built up an RB6 and my rear shock springs are rubbing against the camber linkage. Manual calls for a total of 5mm of spacers on the top shock mount before you put the shock and nut on. If i swap 2mm to the other side of the shock eyelet, it clears it fine. I'm using the 0 deg alum hubs.

Is this ok? Did I build something wrong or is this normal when you set up the rear camber links certain ways w the alum V2 hubs?
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Old 07-06-2014, 08:11 AM   #10569
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Just space it so it doesnt rub.
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Old 07-06-2014, 08:15 PM   #10570
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Originally Posted by K_King View Post
Just space it so it doesnt rub.
Thats what I figured, but wanted to be sure. Thanks.

I'm switching over to KYO from TLR, very excited already by the quality of the build.
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Old 07-06-2014, 09:28 PM   #10571
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Awesome! I love my car as much as I tend to tinker on it and get it way off wack. Every change is noticeable.
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Old 07-07-2014, 09:58 AM   #10572
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ok guys have anyone here tried converting the RB6 to RT6? I basically have 4 Kyosho RB6 and my 5 year old son don't want to race buggy class anymore he wants a truck so that made me think if its possible to convert the RB6 buggy to RT6 stadium truck?
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Old 07-07-2014, 10:40 AM   #10573
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Yes but you'll need a lot more than you're keeping. Shocks. Turnbuckles. Towers. Arms. Quick change. CVDs. Body. Spur. Battery strap. Chassis. It may not seem like a lot but it will be expensive with the shocks and chassis alone.
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Old 07-07-2014, 10:53 AM   #10574
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Quote:
Originally Posted by K_King View Post
Yes but you'll need a lot more than you're keeping. Shocks. Turnbuckles. Towers. Arms. Quick change. CVDs. Body. Spur. Battery strap. Chassis. It may not seem like a lot but it will be expensive with the shocks and chassis alone.
Ok never mind I was hoping the chassis would be the same. I know you need long shock body, Arms and CVD and everything else is the same.
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Old 07-08-2014, 04:38 AM   #10575
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Quote:
Originally Posted by carbons2k View Post
Does anyone have a bearing size and quantity for the rb6? Looking to maybe go with all ceramic bearings....
acer sells a nice set of ceramics on ebay for 67 bucks. just had to order 2 5x13x4 for the alloy hubs
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