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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
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
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 02-04-2014, 07:57 AM   #9691
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The carbon parts are the same wight...
The carbon parts are not the same weight, front tower is 1-2 grams lighter, rear is 4-5 grams lighter(rear motor), arms are about 2 grams lighter each.
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Old 02-04-2014, 08:14 AM   #9692
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The carbon parts are not the same weight, front tower is 1-2 grams lighter, rear is 4-5 grams lighter(rear motor), arms are about 2 grams lighter each.
Then you go and add alloy rear hubs, alloy toe blocks, alloy bellcranks, +misc alloy bling parts...



Best case, you save 1 sticky wight from the car....
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Old 02-04-2014, 08:30 AM   #9693
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Not a KO radio but on my futaba I'm around 70-80 on the EPA and that gets me lock to lock without excessive servo pressure, I can see how running it that high would kill a servo.
If I can share with you guys on the one10 shaking servo: I changed in a spare one10 from my RB5, which hadn't experienced shaking. On the RB6 it would shake. I toned down the EPA to 95% and the shaking had gone.

This leads me to question, is the shaking possibly caused by the Kyosho alum steering cranks and arms? I don't recall shaking with the stock plastic arms at 100% EPA.

I'll also like to try a different KO model later too (RSx Response).

Thanks,
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Old 02-04-2014, 09:26 AM   #9694
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Then you go and add alloy rear hubs, alloy toe blocks, alloy bellcranks, +misc alloy bling parts...



Best case, you save 1 sticky wight from the car....
Between carbon parts, ti screws and mip puck system I droped almost 50grams off the car. With the stock chassis I am right at 1500 grams. Shaving that weight made a big differance in how the car feels, for the better.
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Old 02-04-2014, 10:31 AM   #9695
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My stock rb6 is at 1415 grams right now, had to put a full pack to get upto minimum weight. Except the carbon parts all lightweight parts and titanium on her. Pucks do make a lot of difference and eliminating the slipper.
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Old 02-04-2014, 10:33 AM   #9696
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The carbon parts are not the same weight, front tower is 1-2 grams lighter, rear is 4-5 grams lighter(rear motor), arms are about 2 grams lighter each.
thanks I will order them for the summer season. Winter indoor I break too many stock plastic parts earlier in the mornings cos of the cold.
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Old 02-04-2014, 11:18 AM   #9697
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My stock rb6 is at 1415 grams right now, had to put a full pack to get upto minimum weight. Except the carbon parts all lightweight parts and titanium on her. Pucks do make a lot of difference and eliminating the slipper.
How do you eliminate the slipper? I just lock mine down for 17.5 but taking it off would lower rotating mass. Pics if you have any.
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Old 02-04-2014, 11:25 AM   #9698
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How do you eliminate the slipper? I just lock mine down for 17.5 but taking it off would lower rotating mass. Pics if you have any.
Kyosho Ultima RB6 & RB6.6 Car Thread

speedtech turbo hub I think, sold by Jeff at speedtech
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Old 02-04-2014, 11:42 AM   #9699
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Mine was also under weight, so I went with a full size servo and added a few other items to make weight.

I will look into the turbo hub, thanks for the tip.
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Old 02-04-2014, 11:59 AM   #9700
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How do you eliminate the slipper? I just lock mine down for 17.5 but taking it off would lower rotating mass. Pics if you have any.
The avid setup is impressive, you have to buy the topshaft too, but mine weighed just under 10g for the whole slipper setup, vs 25g for the VTS I was using..
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Old 02-04-2014, 12:55 PM   #9701
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The avid setup is impressive, you have to buy the topshaft too, but mine weighed just under 10g for the whole slipper setup, vs 25g for the VTS I was using..
I wonder if the custom works slipper eliminator would work???
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Old 02-04-2014, 01:27 PM   #9702
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How do you eliminate the slipper? I just lock mine down for 17.5 but taking it off would lower rotating mass. Pics if you have any.
What spur are you using with that slipper eliminator
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Old 02-04-2014, 01:44 PM   #9703
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I have a custom works eliminator I will give it a try when I get the chance, the cw eliminator uses the b3/touring car style spur gear. I have them as small as 55 tooth for oval racing.
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Old 02-04-2014, 02:43 PM   #9704
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What spur are you using with that slipper eliminator
I have an Avid Triad slipper with 69T spur that I simply tighten all the way down. Looking at a slipper eliminator but doesn't look like there are any "drop in" systems available for the RB6. Speedtech turbo hub says it's for the AE/Losi buggies. They're sold out on the site anyway.
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Old 02-04-2014, 03:11 PM   #9705
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I have an Avid Triad slipper with 69T spur that I simply tighten all the way down. Looking at a slipper eliminator but doesn't look like there are any "drop in" systems available for the RB6. Speedtech turbo hub says it's for the AE/Losi buggies. They're sold out on the site anyway.
Yep you need an avid top shaft for it to work. Custom works I got but its sloppy. Tower hobbies sells it. Both need the avid top shaft.
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