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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 10-15-2012, 07:28 AM   #1591
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Loving this car so far. Broke a steering rack and a rear camber block over the weekend so I hope we see alternatives for those parts soon. I had the set screws in the empty holes in the rear camber block and I'm also running the longer ball studs, and it still broke. Put a locknut on the bottom of the ball stud when I replaced the block to try and spread the load a little better...We'll see.

Aluminum steering rack please!
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Old 10-15-2012, 07:54 AM   #1592
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Quote:
Originally Posted by fullsyzz View Post
Loving this car so far. Broke a steering rack and a rear camber block over the weekend so I hope we see alternatives for those parts soon. I had the set screws in the empty holes in the rear camber block and I'm also running the longer ball studs, and it still broke. Put a locknut on the bottom of the ball stud when I replaced the block to try and spread the load a little better...We'll see.

Aluminum steering rack please!
At my track we had a kid make a cf piece out of 2mm and dremel one side down to 1mm, held up all day and seems promising
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Old 10-15-2012, 08:32 AM   #1593
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So i am on the fence about picking up one of these vs sticking with my good ole b4.1. My problem is that i always try out the latest / greatest thing and end up going back to my b4.1.
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Old 10-15-2012, 08:39 AM   #1594
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3 day race weekend at the PNW Gold Cup is in the books. First time ever wheeling the car. Report coming later.

(fwiw, I have two OEM steering racks for sale if anybody wants to buy, pm)
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Old 10-15-2012, 08:52 AM   #1595
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For everyone looking for any kyosho replacement please visit
http://norcalhobbies.com/ for all or any of your kysho needs. or call 510)324-5700 as they have an extensive Kyosho assortment to suit all needs.
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Old 10-15-2012, 08:52 AM   #1596
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Quote:
Originally Posted by Matt Trimmings View Post
So i am on the fence about picking up one of these vs sticking with my good ole b4.1. My problem is that i always try out the latest / greatest thing and end up going back to my b4.1.
Once you go Kyosho RB6, there is NO going back... Trust me...
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Old 10-15-2012, 08:54 AM   #1597
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"I keeeeel you!" Sorry, had to do it.

Matt
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Old 10-15-2012, 09:14 AM   #1598
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Quote:
Originally Posted by bigwavedave33 View Post
yes the gear diff fits.. its the same ole transmission
Actually I put the diff out of my RB5 into my RB6 (freshly rebuilt w/B-Fast) and it didn't fit. There was a lot of side to side play. So, assembled the diff that came in the kit, and it fit fine.....?????
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Old 10-15-2012, 09:19 AM   #1599
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^^^ Mine is the same. I will need to shim it before I run. What size shims will do the trick? Anybody know off hand?

Matt
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Old 10-15-2012, 09:21 AM   #1600
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Quote:
Originally Posted by Matt Trimmings View Post
So i am on the fence about picking up one of these vs sticking with my good ole b4.1. My problem is that i always try out the latest / greatest thing and end up going back to my b4.1.
I have the same illness of needing to try every new car that comes out. It's a big part of the fun of the hobby for me. And yes, even the SVR and the Yokomo.

I absolutely love the RB6. Very likely to be my "keep it" car......until the next newest thing is released.
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Old 10-15-2012, 10:32 AM   #1601
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I was also at the Gold Cup with Capt this weekend. Ended up TQ and winning the Superstock class and was BQ in mod. My first impression was very positive even with brand new tires. As the tires wore in it was like holy steering batman! on power off power...didnt matter. Mind you I am running a full pack and rtr weighed 60.2oz with no added weight anywhere. Most people were running full packs and went to white front springs and gold rear to tame the car a little. 37.5 frt oil and 30 in the back is a good place to start. Most of my runs I could get through the 6min without hitting my lid once. Car seemed to be easy to drive and make small mistakes correctable without rolling over. (except my mod BQ run....2 self inflicted wounds followed by another drivers blowup took me out) But all in all, great car and yes it is better then the rb5. (IMO)
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Old 10-15-2012, 12:50 PM   #1602
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What is the stock gearing setup and do i need to do anything special.
I need to crawl b4 I walk.
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Old 10-15-2012, 01:51 PM   #1603
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Quote:
Originally Posted by Derry View Post
I was also at the Gold Cup with Capt this weekend. Ended up TQ and winning the Superstock class and was BQ in mod. My first impression was very positive even with brand new tires. As the tires wore in it was like holy steering batman! on power off power...didnt matter. Mind you I am running a full pack and rtr weighed 60.2oz with no added weight anywhere. Most people were running full packs and went to white front springs and gold rear to tame the car a little. 37.5 frt oil and 30 in the back is a good place to start. Most of my runs I could get through the 6min without hitting my lid once. Car seemed to be easy to drive and make small mistakes correctable without rolling over. (except my mod BQ run....2 self inflicted wounds followed by another drivers blowup took me out) But all in all, great car and yes it is better then the rb5. (IMO)
Was great seeing you at the cup, Derry! you were a madman in the Rb6. All in all, the car's first big outing in the area was VERY impressive.
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Old 10-15-2012, 01:56 PM   #1604
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New battery brace setup! works like a charm.. aluminum RB5 battery posts with 2mm shim underneath. I will end up cutting off the back inch or two as it doesn't go under the bulkhead (doesnt need to)
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Kyosho Ultima RB6 & RB6.6 Car Thread-imag0280.jpg  
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Old 10-15-2012, 02:08 PM   #1605
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Looks Nice.
I see you are using bullet connectors but how did you do something different. Looks like you used a spacer or something interesting?

Quote:
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New battery brace setup! works like a charm.. aluminum RB5 battery posts with 2mm shim underneath. I will end up cutting off the back inch or two as it doesn't go under the bulkhead (doesnt need to)
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