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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 10-16-2012, 12:29 PM   #1651
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yep.. I think 29 degrees caster will certainly be the ticket on this car.
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Old 10-16-2012, 12:32 PM   #1652
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is there an easier way to get the inserts out?? i put some pretty good work in switching mine the other day.. and now they don't look to sexy. i even put silicone grease on them, still a pain to remove and switch
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Old 10-16-2012, 12:50 PM   #1653
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Originally Posted by t8rtot View Post
is there an easier way to get the inserts out?? i put some pretty good work in switching mine the other day.. and now they don't look to sexy. i even put silicone grease on them, still a pain to remove and switch
I pushed them with pliers from the back side...piece of cake!
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Old 10-16-2012, 12:52 PM   #1654
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Post up some iPhone friendly vids of this car running.
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Old 10-16-2012, 12:57 PM   #1655
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Default Bevel diffs

I just bought all the parts o build a bevel diff for my RB5.
UM610, Um605, UM611, UM613, UM612.

Is there anywhere that gives detailed assembly instructions, what diff oils to use, etc?

Which way the diff goes in transmission.

Thanks.
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Old 10-16-2012, 01:05 PM   #1656
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the wider rf blocks make the car rotate much better from the center of the corner out they also add to the stability due to a wider track width. most tracks i run at are medium to low traction and i still think the wide blocks are the way to go. just my .02 cents.
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Old 10-16-2012, 03:18 PM   #1657
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Quote:
Originally Posted by Retired09 View Post
I just bought all the parts o build a bevel diff for my RB5.
UM610, Um605, UM611, UM613, UM612.

Is there anywhere that gives detailed assembly instructions, what diff oils to use, etc?

Which way the diff goes in transmission.

Thanks.

Don't forget the orings, OR0145 or something.
Nothing special except maybe not overtighten the case.
People tend to run 1000 to 3000.

Heard Kyosho have steel gears available for the 1/10th onroad cars and they fit.


The car is really awesome, ran it only as a Mid motor.
Very happy, they did a great job on a lot of things.
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Old 10-16-2012, 03:41 PM   #1658
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Default RB6 Steering Rack

We have RB6 Steering Racks in stock. Made from 6061-t6 Aluminum. Not anodized as we want to get these out in the market ASAP.

This item is listed for sale see page below.

RB6 Aluminum Steering Racks

Last edited by Turbo911; 01-24-2013 at 02:43 PM.
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Old 10-16-2012, 06:42 PM   #1659
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Originally Posted by Turbo911 View Post
We have RB6 Steering Racks in stock. Made from 6061-t6 Aluminum. Not anodized as we want to get these out in the market ASAP.

This item is listed for sale see page below.

RB6 Aluminum Steering Racks
PM sent
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Old 10-16-2012, 08:09 PM   #1660
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Hi Guys,

Can someone kind enough to tell me what is the different in rear motor and mid motor? I see in the manual they have two options. I will be going with the stock ie rear motor but just interested to know what is the different between the two and are all running rear or mid motor? What conditions should we run mid motor?

Also I'm looking at chaning the rear suspension to the aluminium one. But there is four options. Which one should I get? Or I need to get all 4 of them?


1) KYOUMW515GM - Kyosho Aluminum Wide Rear Outer Suspension Holder (Gunmetal)
2) KYOUMW514GM - Kyosho Aluminum Wide Rear Inner Suspension Holder (Gunmetal)
3) KYOUMW511GM - Kyosho Aluminum Rear Suspension Holder (RF) (Gunmetal)
4) KYOUMW512GM - Kyosho Aluminum Rear Suspension Holder (RR) (Gunmetal)

Cheers guys
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Old 10-16-2012, 08:26 PM   #1661
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Mid Motor is going to be used on super duper mega holy shit high grip. Most UK tracks, or those that use astroturf. If you run on dirt, unless your track is mega grip, I would just run the rear motor.

The mid motor is a lot more aggressive with steering, at the expense of rear grip.
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Old 10-16-2012, 08:31 PM   #1662
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most guys have gone with the wide rear alum. mounts
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Old 10-16-2012, 08:44 PM   #1663
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I see. Thanks mate. That does not sound like something I need. Rear it is. Cheers.

Quote:
Originally Posted by K_King View Post
Mid Motor is going to be used on super duper mega holy shit high grip. Most UK tracks, or those that use astroturf. If you run on dirt, unless your track is mega grip, I would just run the rear motor.

The mid motor is a lot more aggressive with steering, at the expense of rear grip.
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Old 10-16-2012, 08:46 PM   #1664
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Thank mate, so which one I should go for? Sorry not very familiar with this 1/10 setup, my first.

Quote:
Originally Posted by lbckevin View Post
most guys have gone with the wide rear alum. mounts
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Old 10-16-2012, 08:48 PM   #1665
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Quote:
Originally Posted by drstrangelove View Post
Thank mate, so which one I should go for? Sorry not very familiar with this 1/10 setup, my first.
#1 and #2 in your list...
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