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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 02-18-2013, 04:35 PM   #5251
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Avids are softer. But don't forget, it isn't just about the spring rate. Other cars don't carry as much weight up front, and their shock mounting positions might not be the same (huge affect on what weight spring you want to run). So take all that into consideration.


Nope... and probably never will be. My latest is on my website, and the link always takes you to my latest (I just update the same link). I just made my changes/updates yesterday. Car was brutally good this last weekend.

Brandon Collin's RB6 setup for high traction indoor clay
so you have 30 deg total castor then? if we run the block set on 25 and then use 4 deg chubs we are at 29 no? is the one degree worth it?
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Old 02-18-2013, 04:38 PM   #5252
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so you have 30 deg total castor then? if we run the block set on 25 and then use 4 deg chubs we are at 29 no? is the one degree worth it?
Front suspension hanger changes kickup, as well as caster. So 30/0 and 25/4 are very close in regards to caster, they are not close in kikcup/pro-dive.
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Old 02-18-2013, 04:46 PM   #5253
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ahh I see
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Old 02-18-2013, 04:50 PM   #5254
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Brandon,
Do you happen to have a current picture of your car?
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Old 02-18-2013, 05:17 PM   #5255
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Brandon,
Do you happen to have a current picture of your car?


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Old 02-18-2013, 05:18 PM   #5256
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Brandon what is your website?
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Old 02-18-2013, 05:21 PM   #5257
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Brandon what is your website?
gave you the link, last post of last page.
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Old 02-18-2013, 06:11 PM   #5258
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Avids are softer. But don't forget, it isn't just about the spring rate. Other cars don't carry as much weight up front, and their shock mounting positions might not be the same (huge affect on what weight spring you want to run). So take all that into consideration.
Yeah I know, you can tell when pressing on the front that it is stiff, again it works, just fielding options. It can't have more weight than a losi, my buddy has some brass kickup plate that is like 30g on his and still runs softer springs (but I see cav running kyo pink springs on his B4.2 most of the time) lol.
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Old 02-18-2013, 06:40 PM   #5259
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how does the durability on the tb6 compare to the tlr22 after they addressed some of the early issues?
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Old 02-18-2013, 07:09 PM   #5260
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Originally Posted by Cpt.America View Post
Here is what you need to remember:

25 caster = 0mm bumpsteer
30 caster = 3mm bumpsteer (what I am running now)

You can do the math to figure out how much you will need at 27, 29, 32, etc. If you changed caster but didn't adjust bumpsteer washers to keep the car at 0 bumpsteer, you actually made two changes at once. You will feel the affects of bumpsteer just as much as caster... so your test was inconclusive until you make those change corrections.

There might be a difference in how much B.S. washers you run depending on the angle of your camber link as well, but I haven't tested that. The key is to just make sure you measure your bumpsteer before and after your caster changes to make sure you keep it the same so you aren't making two changes at once.
Yeah 1.67mm per ever 3 degrees of caster I suppose.

I was running 29 with 0 shims also before annnnnnnnnnd yeah. hehe. I Was wondering why my toe was so jacked.
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Old 02-18-2013, 10:01 PM   #5261
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how does the durability on the rb6 compare to the tlr22 after they addressed some of the early issues?
Well I found my losi 22 was a tank when it came to durability. But seriously the Rb6 IMO places higher than that. If you read over some posts a few pages back, there are some people who have yet to break a part since they've owned it. The only likely break that i can think of is the steering rack, but there are optional aluminum replacements that some do out of the box. The rb6 is high quality and more pricier for a reason and is probably the most durable 2wd buggies out there.
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Old 02-19-2013, 07:52 AM   #5262
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Has anybody weighed their rb6 for weight distribution?

My rear motor weights - 1561 grams with 32.5% front and 65.5% rear
My mid motor weights - 1506 grams with 35.5% front and 62.5% rear

Went to Joliet (252 entries) this past week end and raced the the rear motor (8.5) in mod and the mid motor in stock (17.5) blinky. Fast lap for the mod was 20.9 secs and 22.4 for stock. It was a high bite wet clay surface that started out with slicks and we finished on ghost pins. Still haven't decided between the mid and rear motor setup, like both.

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I can't decide between mid or rear motor. I ran mod rear motor last weekend and could not get the buggy set up right. Ran mid motor 17.5 blinky and I liked how it jumped/turned. The best "upgrade" I have done in my opinion is going to "narrow" aluminum hub carriers.
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Old 02-19-2013, 09:39 AM   #5263
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I don't post on here very often, but need some help.

I will be attending the Cactus Classic, and need some setup help!

Anyone that has a setup for SRS and would love to share I would greatly appreciate it.
Thanks,
Dustin
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Old 02-19-2013, 10:10 AM   #5264
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For SRS...I would use the Hot Rod Hobbies setup on Petit rc.
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Old 02-19-2013, 10:55 AM   #5265
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Okay cool! Was looking at that but wasn't sure.
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