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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 10-14-2012, 09:44 AM   #1501
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Originally Posted by jpcopeland1 View Post
Use longer ball studs on your caster blocks, and rear bulkheads. Other then that you should be good to go. Also might be wise to pick up a set of Gold springs as the reds are too stiff for the car. You can make them work if your track isn't too bumpy, but if not the back of the car will bounce around a lot and be harder to control then need be.
For confirmation, when you say longer ball studs you are talking about using ones that have a longer threaded part right?
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Old 10-14-2012, 09:46 AM   #1502
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Are the gold springs recommended for front and back?
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Old 10-14-2012, 09:54 AM   #1503
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Hey guys I just picked up a RB6 yesterday. For those of you that have well setup RB5's have you kept it or sold it? I'm thinking of keeping my RB WC SP for stock and run the RB6 in mod. For those that had both do you feel that the RB6 is quicker than the RB5 in stock and mod?

Thanks everyone for all the great build tips and setup information! I can't wait to drive this thing
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Old 10-14-2012, 09:58 AM   #1504
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Originally Posted by Kraig View Post
For confirmation, when you say longer ball studs you are talking about using ones that have a longer threaded part right?
Yes there are 3 Kyosho standard studs.

There are the short black ones that the kit comes with. I have replaced all of those with medium, or long ones.

To figure out what the medium ones look like, they are the same ones that go on the steering rack portion. They do look a little shinier than the longer ones.

I have put long studs on the rear bulkhead, and I also use them on the outside rear hub. I have also replaced the black ones on the outside front hub with mediums. They do go though a tick, however they don't touch anything and since we can now shim that area it makes more sense to use more thread.
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Old 10-14-2012, 10:00 AM   #1505
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Originally Posted by rcfiend View Post
Hey guys I just picked up a RB6 yesterday. For those of you that have well setup RB5's have you kept it or sold it? I'm thinking of keeping my RB WC SP for stock and run the RB6 in mod. For those that had both do you feel that the RB6 is quicker than the RB5 in stock and mod?

Thanks everyone for all the great build tips and setup information! I can't wait to drive this thing
With the RB5 we pretty much had it figured out, and I can say I feel more comfortable with the 6 and I've only run it on 2 race days. If I kept my RB5 I would have used it for stock maybe since it's lighter (I think?) but I can honestly say the improvements over the 5 make weight a non-issue for me. It's just so much more stable and still turns.
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Old 10-14-2012, 10:12 AM   #1506
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Originally Posted by K_King View Post
With the RB5 we pretty much had it figured out, and I can say I feel more comfortable with the 6 and I've only run it on 2 race days. If I kept my RB5 I would have used it for stock maybe since it's lighter (I think?) but I can honestly say the improvements over the 5 make weight a non-issue for me. It's just so much more stable and still turns.
Thx for the feedback. How much heavier is the RB6?
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Old 10-14-2012, 10:14 AM   #1507
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This may have been asked alreday, but I haven't seen it yet. Does the RB5 rear aluminum hub carriers work on the RB6 or do they have different ones?
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Old 10-14-2012, 10:18 AM   #1508
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Originally Posted by rcfiend View Post
This may have been asked alreday, but I haven't seen it yet. Does the RB5 rear aluminum hub carriers work on the RB6 or do they have different ones?
They work fine, they did not redesign the rear hubs from the 5 to the 6
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Old 10-14-2012, 10:25 AM   #1509
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They work fine, they did not redesign the rear hubs from the 5 to the 6
Cool, thx.
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Old 10-14-2012, 10:26 AM   #1510
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and pay attention to the instruction addendum leaflets that they put in there - like clipping the front top bulkhead and whatever that other one was :P
I only got one a4 sized leaflet (moving the front bulkhead studs to the other hole), is there another? Can someone kindly scan and post? Thanks,
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Old 10-14-2012, 10:37 AM   #1511
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Thx for the feedback. How much heavier is the RB6?
Barely if anything at all really from what I gather. The best thing is that the weight is where it should be so its actually a benefit
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Old 10-14-2012, 10:45 AM   #1512
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Barely if anything at all really from what I gather. The best thing is that the weight is where it should be so its actually a benefit
Kevin, do you run the Orion wts battery or a full size? And if so have you added any of the weights to it?
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Old 10-14-2012, 11:00 AM   #1513
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Are the gold springs recommended for front and back?
Only rear, Pink fronts are still the way to go up front.
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Old 10-14-2012, 11:01 AM   #1514
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Kevin, do you run the Orion wts battery or a full size? And if so have you added any of the weights to it?
Only the standard shorty, no weight added.
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Old 10-14-2012, 11:02 AM   #1515
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I only got one a4 sized leaflet (moving the front bulkhead studs to the other hole), is there another? Can someone kindly scan and post? Thanks,
If I can find mine, I'll post it. It is the addendum that tells you to shave down the turnbuckle that attaches to the servo horn. If yours clears without hitting anything like mine does, you don't need the sheet.
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