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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 01-10-2013, 03:52 PM   #4126
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Just need to know if these GenAce saddles fit in with the setup i mentioned. Hope i was clear enough so you can understand!

Thanks everyone
I think you are going to have a hard time finding guys running saddle packs, as they are the heaviest type of battery pack, and the car is already over-weight. Unless you find a guy running the car on a very very loose track, most will be running lighter short packs, and maybe some stick packs.
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Old 01-10-2013, 04:17 PM   #4127
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I think you are going to have a hard time finding guys running saddle packs, as they are the heaviest type of battery pack, and the car is already over-weight. Unless you find a guy running the car on a very very loose track, most will be running lighter short packs, and maybe some stick packs.
you sure saddles are the heaviest pack? my sadlles are 260g, stick pack is 310g and shorty is 190g, i run outdoors so for me i thought saddles would be a good compromise, first big race of the year is feb 8th, ill report what i find
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Old 01-10-2013, 04:56 PM   #4128
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Originally Posted by Cpt.America View Post
I think you are going to have a hard time finding guys running saddle packs, as they are the heaviest type of battery pack, and the car is already over-weight. Unless you find a guy running the car on a very very loose track, most will be running lighter short packs, and maybe some stick packs.
Hey Captain

We usually run on high traction carpets, with small jumps. The tracks are veeeeery smooth. Do you think i would be better off with a shorty than saddles?

I only tried full size lipos so far, and been doing my setups with that...
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Old 01-10-2013, 05:02 PM   #4129
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the only real reason to run saddles is that you simply already have them
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Old 01-10-2013, 05:05 PM   #4130
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the only real reason to run saddles is that you simply already have them
no thats not the only reason to run them, the fact that they are lighter than a full pack but heavier than a shorty makes them a nice tuning option and a good in between choice , especially if you run outdoors
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Old 01-10-2013, 05:38 PM   #4131
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I run saddles in rear motor configuration. I prefer it to the full size stick pack. I don't own any shorties so can't comment.
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Old 01-10-2013, 07:49 PM   #4132
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I just weighed my car for the first time last night and I am coming in at 1620g. I noticed that some of you guys mentioned your kits were around 1550g. I am a noob and I am not sure if 70 grams will make that much of a difference. I have made no attempts to put this thing on a diet. Do you guys have any easy fixes to reduce weight? I know this topic has been discussed before but I haven't found any posts for solutions. Here is my setup: Fantom shorty 4500mah, Orion Pro Esc (full length wires), Phantom 3.5 17.5T , savox 1258, airtronics receiver, mylaps, aluminum hubs, aluminum pinion gear.
I pulled about 30grams of wet clay off my car after running my heat last night. Just another thought for weight loss! 😯 This is offroad, just sayin...
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Old 01-10-2013, 08:26 PM   #4133
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How does this thread still not have an informational first post? I've got probably over 20pages bookmarked from this thread alone.
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Old 01-10-2013, 08:45 PM   #4134
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How does this thread still not have an informational first post? I've got probably over 20pages bookmarked from this thread alone.
Were working on it.
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Old 01-10-2013, 08:45 PM   #4135
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you sure saddles are the heaviest pack? my sadlles are 260g, stick pack is 310g and shorty is 190g, i run outdoors so for me i thought saddles would be a good compromise, first big race of the year is feb 8th, ill report what i find
It's what iv been told... but I could be wrong! Are you weighing same brand, and same mah?
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Old 01-10-2013, 08:59 PM   #4136
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It's what iv been told... but I could be wrong! Are you weighing same brand, and same mah?
i guess i should rephrase that, i run murfdogg lipos, and for what he offers the saddles are in the middle as far as weight, the stick is 5500 mah, saddle pack is 4600mah and i think the shorty was around 5000mah, an easy way to cut weight is run a lower mah battery, honestly a 4000 mah will prolly get you a 6 min main with plenty of room to spare, after 6 minutes with my 4600 im still around 7.9v so its not using much
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Old 01-10-2013, 09:11 PM   #4137
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i guess i should rephrase that, i run murfdogg lipos, and for what he offers the saddles are in the middle as far as weight, the stick is 5500 mah, saddle pack is 4600mah and i think the shorty was around 5000mah, an easy way to cut weight is run a lower mah battery, honestly a 4000 mah will prolly get you a 6 min main with plenty of room to spare, after 6 minutes with my 4600 im still around 7.9v so its not using much
Yep.. there ya go. If you compared mah to mah, i bet your saddles would be heavier. Its because the saddles have more wire, more plugs, and more case. Probably not much, but 10 or 15 grams anyway. Iv never measured direct mah to mah from the same manufacturer, but that is where I would put my money.
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Old 01-10-2013, 09:13 PM   #4138
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Hey Captain

We usually run on high traction carpets, with small jumps. The tracks are veeeeery smooth. Do you think i would be better off with a shorty than saddles?

I only tried full size lipos so far, and been doing my setups with that...
If I were running a mid motor car on a VERY high traction track, like turf or carpet, I would have my car down as light as I could get it, with a shorty. Id be running right at 1499. Weight generates traction, and slows reaction. On carpet, where you tend to dial out traction with roll center changes, ride height, and tires.... you don't need the weight of the heavier pack. Run a heavy pack on loose outdoor dirt tracks to generate more grip, run a light battery on carpet to reduce grip.
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Old 01-11-2013, 01:27 AM   #4139
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Quick pic of the night I finished it. Has a RB5 type battery hold down now, and yes those are lunsford TI shock mounts made for the SC10/B4, they fit great if you don't mind the nuts being a standard size

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Old 01-11-2013, 02:09 AM   #4140
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If I were running a mid motor car on a VERY high traction track, like turf or carpet, I would have my car down as light as I could get it, with a shorty. Id be running right at 1499. Weight generates traction, and slows reaction. On carpet, where you tend to dial out traction with roll center changes, ride height, and tires.... you don't need the weight of the heavier pack. Run a heavy pack on loose outdoor dirt tracks to generate more grip, run a light battery on carpet to reduce grip.
That is what you'd think however most carpet setups, in the uk for example they run quite a bit of additional weight.
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