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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 07-30-2014, 05:01 PM   #10651
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Originally Posted by ben73 View Post
anyone know of a ball stud that will accept a 2mm hex driver and work with the standard rod ends. I want to replace the inner rear stud as its difficult to access.
Use either the Lunsford Ti ones for the RB6 or I believe the Losi 22 ballstuds fit the stock ballcups.
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Old 07-30-2014, 10:25 PM   #10652
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Quick question regarding setup. I'm running rear motor on a low traction bumpy surface. What can I do to give me more initial turn in. I feel the car understeers on entry.
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Old 07-30-2014, 11:03 PM   #10653
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Originally Posted by Speedychris22 View Post
Quick question regarding setup. I'm running rear motor on a low traction bumpy surface. What can I do to give me more initial turn in. I feel the car understeers on entry.
are you using UMW705 and UMW706? try adjusting your toe in or try a lighter front shock oil. Much better post your setup.
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Old 07-31-2014, 02:39 PM   #10654
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are you using UMW705 and UMW706? try adjusting your toe in or try a lighter front shock oil. Much better post your setup.
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Old 07-31-2014, 09:19 PM   #10655
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You can try shortening the rear wheelbase...you will get more initial turn in and some more traction
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Old 08-01-2014, 02:42 AM   #10656
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Just picked up a used rb5 and since the gearbox is same as the 6 what spur and pinion you guys run on 17.5t Blinky. Iam running a Tekin motor as well.
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Old 08-01-2014, 03:33 AM   #10657
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You can try shortening the rear wheelbase...you will get more initial turn in and some more traction
Ok thanks I'll try it
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Old 08-01-2014, 05:04 AM   #10658
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Quote:
Originally Posted by Speedychris22 View Post
Quick question regarding setup. I'm running rear motor on a low traction bumpy surface. What can I do to give me more initial turn in. I feel the car understeers on entry.
Do you just want faster response / initial turn-in or does the car also understeer mid-corner? Because generally getting faster turn-in will trade off grip mid-corner. Increasing front roll stiffness (springs, roll center height, shock position) or decreasing rear roll stiffness should get you faster turn-in, as would less front camber, longer rear or shorter front wheelbase, increased damping at the front shocks or lower front ride height. These changes may have a negative effect on mid-corner understeer however.

I would also try putting the screws back in the side pods. You may be getting too much torsional flex.

Or dial in some more drag brake and back off the throttle to get more oversteer on corner entry.
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Old 08-01-2014, 06:10 AM   #10659
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Originally Posted by Zylux View Post
Do you just want faster response / initial turn-in or does the car also understeer mid-corner? Because generally getting faster turn-in will trade off grip mid-corner. Increasing front roll stiffness (springs, roll center height, shock position) or decreasing rear roll stiffness should get you faster turn-in, as would less front camber, longer rear or shorter front wheelbase, increased damping at the front shocks or lower front ride height. These changes may have a negative effect on mid-corner understeer however.

I would also try putting the screws back in the side pods. You may be getting too much torsional flex.

Or dial in some more drag brake and back off the throttle to get more oversteer on corner entry.
I feel I'm wide into turn as well as mid corner.
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Old 08-01-2014, 08:17 AM   #10660
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I think many used 33/69 with a 17.5. I would have to check the RB5 thread. It is a good read but long. I still have my RB5 and plan to also run 17.5 but I just haven't had the time.
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Old 08-01-2014, 09:14 AM   #10661
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Quote:
Originally Posted by danjoy25 View Post
Just picked up a used rb5 and since the gearbox is same as the 6 what spur and pinion you guys run on 17.5t Blinky. Iam running a Tekin motor as well.
Quote:
Originally Posted by Arcain41 View Post
I think many used 33/69 with a 17.5. I would have to check the RB5 thread. It is a good read but long. I still have my RB5 and plan to also run 17.5 but I just haven't had the time.
I agree with Arcain41 but it will ultimately depend on your track size and how much timing you are running, both motor and speed control if allowed. You can't go wrong with a 69 but just be sure to have some additional pinion gears just in case.
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Old 08-01-2014, 05:40 PM   #10662
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Thanks guys. 69t spur ordered. at the moment I only have 76t and can only fit a maximum 29t pinion. Can I dremel the motor holes a tiny bit so I can squeeze in a 30-32 tooth pinion or would this stuff up the balance or might be too close to the motor cover which might not be good.
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Old 08-03-2014, 01:26 PM   #10663
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Originally Posted by Speedychris22 View Post
Quick question regarding setup. I'm running rear motor on a low traction bumpy surface. What can I do to give me more initial turn in. I feel the car understeers on entry.
Tires make a huge difference. Try AKA rebar etc in front?
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Old 08-04-2014, 11:40 AM   #10664
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Anyone tried drilling holes on the inside of the rear arms yet?
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Old 08-04-2014, 12:16 PM   #10665
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Check it out.
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Kyosho Ultima RB6 & RB6.6 Car Thread-image.jpg  
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