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Kyosho Ultima RB6 & RB6.6 Car Thread

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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
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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 05-07-2019, 07:47 AM
  #14941  
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Originally Posted by hairymuffin View Post
Pics will tell us what you have, mainly the chassis. All of the suspension parts from the rb7 will fit your car regardless of which model you have. Still worth building, . Plenty parts around
I tried to upload pics ??
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Old 05-07-2019, 08:13 AM
  #14942  
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Please can someone help me on uploading some pics? I tried so many times it says I only post ULR from other sites??
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Old 05-07-2019, 02:05 PM
  #14943  
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You need to get your post count up to be able to post pictures. The only real difference between the rb6 vs the rb6.6 is the chassis and the laydown tranny. You can modify the rb6 chassis to install the laydown tranny. If he has the 3 gear stand up, it is very hard to tell the difference without putting it side by side.



The RB6.6 has the extra holes in the middle of the back of the chassis to fit the laydown tranny. That is the only sure fire way to tell the difference between them unless the previous owner drilled and countersunk his chassis
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Old 05-09-2019, 10:18 PM
  #14944  
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Hello, beautiful people of Rctech,

I am looking to get back into RC racing and have set my sights on the RTR version of the Ultima 6.6. I was a Kyosho driver and I would like to get back into this class with one of their offerings.

I have had quite a bit of experience racing so I am aware that the RTR versions usually have some limitations but I just can't afford a full race package right now. I do have a few questions about how this will hold up though.

What are the main disadvantages of the RTR kit (minus electronics). I am worried about the plastic shocks and the shock caps popping off... how big of an issue is this, Can this car take a hard knock and continue to race? or would a race incident see me retire every time? How much less durable is it compared to the kit version?

I'm thinking the parts would be mostly interchangeable but are there any curveballs that I should be aware of? Anyone raced one of these yet and how does it compare in terms of race capabilities to the kit version.

I think my major concerns are just durability. I will be replacing the electronics with a Savox servo, LRP flow ESC and an orion 17.5 turn motor immediately. Also my batts are a bit puffed. Will they still fit this car?

Thanks. Any info is greatly appreciated.
Have a good one.
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Old 05-10-2019, 08:21 AM
  #14945  
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Hello, I went this exact same route and got the RB6.6 RTR to get me going in racing.

My findings:
- The car is set up for dirt or low/med grip surfaces with a 4 gear stand up transmission. If you will be racing on high grip or carpet a laydown is a must upgrade
- There is 100% compatibility between the RTR and the 6.6 Kit version. There is even a 90% compatibility with the new RB7. This means when I broke a front arm I replaced it with an upgraded gull-wing RB7 arm.
- The plastic shocks are definitely the weakest area, the caps will pop on hard landings. Upgrading to at least alum caps will help, though eventually the full alum bodies will be the best option
- In terms of durability, its fine. Does not break more often than other brands at the track
- You are already planning to upgrade electronics, the servo is a must. The motor included in the RTR however is quite fast!
- Overall the 6.6 RTR is great car to get going and with patience and a little budget over time you can upgrade gradually to the point where you end up with an RB7

Enjoy!
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Old 05-11-2019, 06:26 AM
  #14946  
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Thanks for the quick reply,

Really appreciate it. Am already looking forward to owning another kyosho buggy

One quick qeustion though. I saw that it comes equipped with dogbones and not swingshafts. Do the dogbones pop out easily?
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Old 05-11-2019, 07:07 AM
  #14947  
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$250 is a good deal for the rtr, it will get you on the track plus I’m sure it’s pretty capable. I’m sure you will end up spending more on upgrades later but it’s not a bad deal to get your feet wet. I’m sure the dog bones can pop out in a crash, but it’s not often you break a rear arm. We all can tell you that the newest LD cars are the best but but we should not be trying to discourage anyone from getting to the track. Not easy dropping $600 on a rc car. This hobby needs the entry level guys at the track to have fun, and not spend a ton

Last edited by hairymuffin; 05-11-2019 at 07:25 AM.
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Old 05-14-2019, 08:20 AM
  #14948  
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I've pulled the trigger but haven't brought the car home.

Am still waiting on some parts from the LHS for my other cars before I pick up everything. Can't just show up in front of the missus with a new car. It's less conspicuous if it follows me home in a box of parts...

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Old 05-14-2019, 12:39 PM
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Originally Posted by tak4 View Post
Thanks for the quick reply,

Really appreciate it. Am already looking forward to owning another kyosho buggy

One quick qeustion though. I saw that it comes equipped with dogbones and not swingshafts. Do the dogbones pop out easily?
No, they do not pop out easily as long as the rear arm does not break. Upgrading to swingshafts is a good performance alternative down the road.
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Old 05-19-2019, 08:06 PM
  #14950  
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Do they make front gullwing arms for the rb6.6?
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Old 05-20-2019, 07:40 AM
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Originally Posted by gawith0413 View Post
Do they make front gullwing arms for the rb6.6?
You can use the RB7 Gull-wing arms. They are a direct fit for the RB6.6
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