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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 11-28-2013, 09:40 AM   #8761
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Originally Posted by klimag View Post
Hello

I'm just building the RB6 and have an issue with the small place for the servo (normal size) and the steering arm touch the the front "upper plate"
I know from earlier read that there is a trick to do there something but cannot find in the long thread. Could you please explain me what should I do there?

Thanks
I had to dremel that part out really good!
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Old 11-28-2013, 10:14 AM   #8762
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Originally Posted by Mxer59 View Post
In the kit there should be some little papers with extra updated building separate then what the manual shows. It shows that you have to dermal the right and left side of the top bulk head in two little spots. So that the servo arms clear.
Hope this helps
I got my kit in august and didnt recall the extra paperwork. Did they do a running change to update the top piece? Because i dont think i bind. But maybe i should check it out
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Old 11-28-2013, 12:17 PM   #8763
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also, what are some pinion numbers i need to buy when i buy the rb6? 30-35???
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Old 11-28-2013, 01:34 PM   #8764
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Thanks to all of you for the answers - I made enough clearance for the steering with removing some material from the upper plate

sorry I would have other question joing to the previous post - which pinion to start?

On Saturday my daughter will run the RB6 in stock class (13,5) race and we will have no time to try anything before as I will be just ready. The track is high grip carpet and very techical with several jumps. The biggest pinion I have is 26. I have experience with ZX5 where tipically 19-21 OK. Should we start here with higher touth numbers?
Thanks for your help.
(The pressure is big on me from may daughter to have tecnhically OK buggy .)
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Old 11-28-2013, 04:25 PM   #8765
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Originally Posted by nickdawg18 View Post
also, what are some pinion numbers i need to buy when i buy the rb6? 30-35???
Blinky 17.5?
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Old 11-28-2013, 05:25 PM   #8766
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Quote:
Originally Posted by Mxer59 View Post
In the kit there should be some little papers with extra updated building separate then what the manual shows. It shows that you have to dermal the right and left side of the top bulk head in two little spots. So that the servo arms clear.
Hope this helps
This is a known issue and Kyosho have since updated their download PDF manual showing you need to cut off those areas. Cheers,
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Old 11-28-2013, 05:28 PM   #8767
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The last kit I built that area was already changed to clear the steering.

There was a note added in the box about cutting it. Maybe new stock verses old stock.
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Old 11-29-2013, 09:11 AM   #8768
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The RB6 fired up finally. Is it normal to have free play (free movement) at spur axle? In axial direction about 0.8mm in radial direction around 0,1-02mm.
Thanks
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Old 11-30-2013, 09:17 AM   #8769
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Did you out the .3mm shim in?
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Old 11-30-2013, 10:51 AM   #8770
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Do you still use the spacer in between the bearings in the new hubs? I notice with the spacer in it seems a little to fat.. The bearings will not seat fully but its close.
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Old 11-30-2013, 02:31 PM   #8771
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Do you still use the spacer in between the bearings in the new hubs? I notice with the spacer in it seems a little to fat.. The bearings will not seat fully but its close.
You want a little play other wise the bearings might get crushed when you tighten the wheel down
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Old 11-30-2013, 04:29 PM   #8772
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Originally Posted by VenturaDC View Post
Blinky 17.5?
yes. sometimes i run boost too.

i'm making an order at amain and I have no idea what pinions and spur gears i should get.
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Last edited by nickdawg18; 11-30-2013 at 05:34 PM.
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Old 11-30-2013, 11:30 PM   #8773
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Quote:
Originally Posted by nickdawg18 View Post
yes. sometimes i run boost too.

i'm making an order at amain and I have no idea what pinions and spur gears i should get.
+1
Ill be running my new rb6 in 17.5 stock class
Ill be running the tekin rs gen 2 motor an esc and would like to know what gearing i need to run.
Thanks in advance
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Old 11-30-2013, 11:33 PM   #8774
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+1
Ill be running my new rb6 in 17.5 stock class
Ill be running the tekin rs gen 2 motor an esc and would like to know what gearing i need to run.
Thanks in advance
if ur not running avid setup then you get the losi 22 70tooth spur with matching slipper pads and then i like robinson aluminum pro 29-35 pinions
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Old 12-01-2013, 12:11 AM   #8775
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For boosted 17.5 I run 28\76 on a decently high traction outdoor track. With that gearing I run max boost with a lot of end bell timing as well, and my car is ballistic fast.

For blinky I run 28-34 with the avid slipper and 69 spur.
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