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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 11-28-2014, 12:14 PM   #11161
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Im running with a shorty all the way back against the motor. Mid configuration. And personally, I wouldve bought the zx6. I tried A different brand recently and it was the biggest mistake I ever made. My Kyosho cars always ran well. No matter what track I ran them on.
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Old 11-28-2014, 02:40 PM   #11162
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I joined this forum just for the information on this car. I saw that there was over 500 pages to scree through so it should keep me busy for a while. I bought an RB6 Ready Set about 3 weeks ago due to it being on sale at the LHS for 23,000 yen so it really only cost me around $210 based on the conversion rate. The track is an indoor clay bumpy track (Champ Stadium in Sagamihara) so I got some Panther Switch 2.0 clay tires, Pro-Line closed cell foams, and swapped out the motor, ESC, and servo. I have a Solar D770 low profile servo on order for it but in the mean time I threw in a Tactic servo from my Yeti seeing it was metal gear and a bit stronger than the stock ESC. I am running an Axial AE-3 ESC and a Tacon 3500kv motor at the moment but am going to be putting a sensored system in it. have a HW XERun 4000kv system that I will probably pull from my Wraith and use. I already swapped out the springs as well for gold rears and pink fronts, Kyosho aluminum steering rack, removed the servo saver and am using an aluminum servo horn, Kyosho aluminum rear hangar set, and Kyosho aluminum .5 rear hubs. It comes with the gear diff so I threw in some 7k oil. The only things I have broken so far have been camber and steering links so they got replaced with Lunsford links.

I have been very impressed with this car but it was setup very loose out of the box. The biggest game changer was getting the right tires and springs on it. I love this car and will drive the 45 min each way to the track 2-3 times a week just to get my fix on it. 1/10 buggy racing is very popular here so plenty of folks to race with.
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Old 11-28-2014, 08:18 PM   #11163
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Quote:
Originally Posted by tobamiester View Post
Or direct w/ Free shipping
Forgive my no doubt silly question but that kit is a direct replacement for all the bearing that come with the RB6 kit?
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Old 11-28-2014, 08:32 PM   #11164
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Forgive my no doubt silly question but that kit is a direct replacement for all the bearing that come with the RB6 kit?
Avid had complete kits for about a dollar a bearing.
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Old 11-28-2014, 09:45 PM   #11165
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Forgive my no doubt silly question but that kit is a direct replacement for all the bearing that come with the RB6 kit?
Yes whole kit, ceramics. If u want ceramics for just the tranny, schelle racing has just for tranny
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Old 11-29-2014, 02:29 AM   #11166
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Thanks for the info but just another question I've ordered my MIP Pucks 17.5 Drive System and I'm now guessing I would need to buy two individual ceramic bearing to replace these ones that come with MIP kit

2 x HW-BEARING/ 5/32in x 5/16in x 1/8in Ball Bearing (these are the ones that go in the middle of the ball diff between the outdrives is that correct?)

If so do Acer have them?
I figure while I'm pulling down most of my RB6 I might as well put some new bearings thru all of it including hubs etc.
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Old 11-29-2014, 03:11 AM   #11167
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Quote:
Originally Posted by KalEl63 View Post
Thanks for the info but just another question I've ordered my MIP Pucks 17.5 Drive System and I'm now guessing I would need to buy two individual ceramic bearing to replace these ones that come with MIP kit

2 x HW-BEARING/ 5/32in x 5/16in x 1/8in Ball Bearing (these are the ones that go in the middle of the ball diff between the outdrives is that correct?)

If so do Acer have them?
I figure while I'm pulling down most of my RB6 I might as well put some new bearings thru all of it including hubs etc.
http://www.acerracing.com/ball_beari...ng-1118-1.html
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Old 11-29-2014, 06:16 AM   #11168
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Quote:
Originally Posted by KalEl63 View Post
Thanks for the info but just another question I've ordered my MIP Pucks 17.5 Drive System and I'm now guessing I would need to buy two individual ceramic bearing to replace these ones that come with MIP kit

2 x HW-BEARING/ 5/32in x 5/16in x 1/8in Ball Bearing (these are the ones that go in the middle of the ball diff between the outdrives is that correct?)

If so do Acer have them?
I figure while I'm pulling down most of my RB6 I might as well put some new bearings thru all of it including hubs etc.
I built my mip pucks system with the ball bearings that came in the kit. I must say that it is still extremely smooth after 4 weeks of racing.
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Old 11-29-2014, 02:44 PM   #11169
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Quote:
Originally Posted by glenng View Post
Thanks for that I wasn't sure how to search for them

Quote:
Originally Posted by Potoczak View Post
I built my mip pucks system with the ball bearings that came in the kit. I must say that it is still extremely smooth after 4 weeks of racing.
I've ordered son tungsten balls for it and an AVID captured thrust bearing.
I just figures if I'm going to do it might as well go all out hence replacing the two bearing in the middle too.

Just out of interest do you know how may GM's the MIP system is compared to the kits set up?
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Old 11-29-2014, 07:40 PM   #11170
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Quote:
Originally Posted by KalEl63 View Post
Thanks for that I wasn't sure how to search for them



I've ordered son tungsten balls for it and an AVID captured thrust bearing.
I just figures if I'm going to do it might as well go all out hence replacing the two bearing in the middle too.

Just out of interest do you know how may GM's the MIP system is compared to the kits set up?
I have it written down somewhere but i think 20grams weight saving overall w both ball or gear diff. Steel gear weight used in puck gear diff is easily offset by the velvet coated alloy pins u can buy for the gear diff. I weighed every possible
Combination when setting up pucks. I just gotta find the piece of paper.
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Old 11-29-2014, 08:17 PM   #11171
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Has anyone used the Lunsford titanium axels? Any pros cons to them?
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Old 11-29-2014, 09:34 PM   #11172
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Has anyone used the Lunsford titanium axels? Any pros cons to them?
I have them on my rb6. Personally didnt notice any difference. Just bling for me.
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Old 11-30-2014, 02:05 AM   #11173
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Quote:
Originally Posted by glenng View Post
I have it written down somewhere but i think 20grams weight saving overall w both ball or gear diff. Steel gear weight used in puck gear diff is easily offset by the velvet coated alloy pins u can buy for the gear diff. I weighed every possible
Combination when setting up pucks. I just gotta find the piece of paper.
Cheers for that it's handy for me to know as a rough guide as with that and the SMC batteries I'm going to run I may even go under the 17.5 weight
Either way I'll be close to it.
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Old 11-30-2014, 05:49 AM   #11174
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I am somewhat new to the hobby. I have built a kyosho 1.8 scale buggy and love it. I want to start racing and the 1.10 scale buggy class is big. I have been trying to buy a used rb6 with no luck. I have a losi 22 and my son has a b5 but i really like the kyosho brand. what motors is everyone running. ??? Can anyone give me a quick set up or hop up list. I am going to order me a kit tonight. thank you
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Old 11-30-2014, 06:36 AM   #11175
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Quote:
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I am somewhat new to the hobby. I have built a kyosho 1.8 scale buggy and love it. I want to start racing and the 1.10 scale buggy class is big. I have been trying to buy a used rb6 with no luck. I have a losi 22 and my son has a b5 but i really like the kyosho brand. what motors is everyone running. ??? Can anyone give me a quick set up or hop up list. I am going to order me a kit tonight. thank you
Everything you need is on the first couple of posts on this thread. Also, combined with info here: http://www.petitrc.com/setup/kyosho/...UltimaRB6.html

Zack Rogers MM setup was a good starting point for me.

Get the Alum Steering Rack, and Rear RF and RR hangers and Rear v2 0degree hubs. Thats about it...
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