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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 12-25-2012, 11:44 AM   #3601
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Make sure to use beefer Rf2 or you'll be changing it out again mine broke not even hitting anything, for the rear I use the RB5 one in box as that's what a team Kyosho driver showed me to do along with no shim under the blocks
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Originally Posted by MrHistory View Post
I am trying a setup that calls for "Narrow blocks in rear hinge pins"

I started going through my car and parts bag. I'm totally confused because I have 2 blocks marked RF2. I assume the less beefy one is from the RB5...

Do I use the RF block and the narrow rear rear part? The narrow rear rear block is also less beefy and on the diagram it is greyed out indicating its not for this kit???

Someone please explain and maybe even tell me which parts in the diagram I should use.
Thx
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Old 12-25-2012, 11:55 AM   #3602
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The original RF is fine if you want to go narrow. It is not thin like the original RF2.
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Old 12-25-2012, 12:45 PM   #3603
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Quote:
Originally Posted by toast. View Post
Looking at replacing my RSXResponse (65.6g) with a RSXone 10 (51.0g), so that i can use the Response in a touring car.

Is the RSXone 10 a good choice?
It's a good servo but IMO its a bit underpowered running throu the esc. I made the jumper and run mine at 7.4 and it's much better
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Old 12-25-2012, 02:45 PM   #3604
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Thanks Guys.

I will use the RF block, and the narrower rear block in the bag. This part is not labelled with a part# in the RB6 manual. I guess this is what you are calling the RB5 RR part?
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Last edited by MrHistory; 12-25-2012 at 02:55 PM.
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Old 12-25-2012, 03:19 PM   #3605
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ok still thinking about the rb6 and the b4. Biggest reason Im still thinking is I dont believe my local track carries kyosho parts but carries tons of associated parts. Thats the reason I keep asking about durablity, meaning I will have to order every thing basically online.
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Old 12-25-2012, 04:03 PM   #3606
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Quote:
Originally Posted by tony montana View Post
ok still thinking about the rb6 and the b4. Biggest reason Im still thinking is I dont believe my local track carries kyosho parts but carries tons of associated parts. Thats the reason I keep asking about durablity, meaning I will have to order every thing basically online.
Durability on the car is good. I wouldn't hesitate to get one even if my local track didn't carry Kyosho stuff. In fact, so far all they carry is arms for the RB6, so with some careful planning and purchasing of typical spares you should be all set. Of course there is always a chance you might break something you can't get without ordering..... It's a risk I am willing to take
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Old 12-25-2012, 04:10 PM   #3607
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Quote:
Originally Posted by tony montana View Post
ok still thinking about the rb6 and the b4. Biggest reason Im still thinking is I dont believe my local track carries kyosho parts but carries tons of associated parts. Thats the reason I keep asking about durablity, meaning I will have to order every thing basically online.
What I have broken and how....top plate sent it off a huge triple easily 8tt of air and 25 ft wide. Colliding with a sc in the air. Front spindle same jump over shot by a few feet landed on left front wheel. So basically all the weight of the car hit it. Turnbuckles I have snapped 2 replaced them with the larger 22 turnbuckles. A rf block but it was because I used the thin one. Replaced it with the stock thicker one and have had no problems. Rear arm going full wood down the straight and caught a pipe coupler. Any arm would have broken....durability I give it an A+ as I'm very hard on my cars and run mod so everything hits faster and harder.
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Old 12-25-2012, 05:00 PM   #3608
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Durability is really a none issue. Even if you have parts at your LHS should still have a few basic parts on hand, do that but still won't need them.

I don't know if any shop with in 100mi that carries a kyo part or car. And there are more RB5/6s than Losi's which our lhs has plenty of stock for.
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Old 12-25-2012, 05:19 PM   #3609
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Quote:
Originally Posted by t8rtot View Post
Durability is really a none issue. Even if you have parts at your LHS should still have a few basic parts on hand, do that but still won't need them.

I don't know if any shop with in 100mi that carries a kyo part or car. And there are more RB5/6s than Losi's which our lhs has plenty of stock for.
What I've broken (all hard crashes or someone crashing hard into me):
Front bearing carrier (my fault - pipe hanger on front straight)
Rear hinge pin holder, RF2 (my fault - pipe hanger on front straight)
Rear hub (as* clown wiped me out on front straight)

I own Kyosho for 1/8 nitro bug and trug + the RB6. I have a ton of parts that I fortunately/unfortunately have stocked up...
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Old 12-25-2012, 07:38 PM   #3610
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Any issues fitting a viper vtx10 in the car?
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Old 12-25-2012, 07:46 PM   #3611
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I have an r10 which is similar in size not an issue.

Go to petit rc and you'll see a ton of different installs.
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Old 12-26-2012, 01:13 AM   #3612
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Quote:
Originally Posted by tony montana View Post
Any issues fitting a viper vtx10 in the car?
If you plan on jamming it underneath the bulkhead in RM, you'll need to remove the caps. Unless it's a BE.

I removed mine (vtx10, black caps) and put one of those narrow 4X cap sets from HW on, stuck it on the chassis between the battery and the plastic sideguard. Unfortunately I'm on holiday and don't have a pic for you. Black caps version will only fit partially under. I ran it like that for a few months, no issues, changed it anyway. Silver caps should fit further underneath, but not fully.



I haven't broken anything on my buggy yet. Cleaned someone up as they drove onto the middle of the straight from the side, no breakages. Done a few cartwheels, haven't broken the rear hubs yet. Still haven't broken the steering plate like everyone else seems to have done...
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Old 12-26-2012, 09:53 AM   #3613
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Well I just ordered the rb6 hope I made the rightdecision. Also ordered a spare steering rack thing as I hear its a weak part
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Old 12-26-2012, 09:55 AM   #3614
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Quote:
Originally Posted by tony montana View Post
Well I just ordered the rb6 hope I made the rightdecision. Also ordered a spare steering rack thing as I hear its a weak part
*If* you have issues with breaking the rack snag the Exotek alum. version. They make the bellcranks as well. I haven't seen many racks break in my area though.
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Old 12-26-2012, 09:58 AM   #3615
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Quote:
Originally Posted by tony montana View Post
Well I just ordered the rb6 hope I made the rightdecision. Also ordered a spare steering rack thing as I hear its a weak part
you made the best decision! welcome to the Red Army!

we're all here for whatever questions you may have.
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