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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 09-30-2012, 08:47 PM   #826
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What's the part number for the long ball stud? Thx
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Old 09-30-2012, 09:00 PM   #827
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What's the part number for the long ball stud? Thx
Um128
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Old 09-30-2012, 09:14 PM   #828
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hows everyone mounting there elecs,i put my orion speedo under and reciver on top plate like pics but its horrible for routing wiring to battery plugs unless i re soldier new wires and put plugs towards front of car and reciver sits very high with wiring,rather keep lower center of gravity..??
O and im running full pack..
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Old 09-30-2012, 09:40 PM   #829
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Quote:
Originally Posted by BISBEE 248 View Post
hows everyone mounting there elecs,i put my orion speedo under and reciver on top plate like pics but its horrible for routing wiring to battery plugs unless i re soldier new wires and put plugs towards front of car and reciver sits very high with wiring,rather keep lower center of gravity..??
O and im running full pack..
Re-soldering new wires is typically part of the build process. One wire setup/length for one car won't typically work for another.
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Old 09-30-2012, 09:47 PM   #830
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Have a question. What size big bores come with this kit? Like AE's new b44.2 comes with 12mm. All i can find is 38mm
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Old 09-30-2012, 09:54 PM   #831
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Originally Posted by BISBEE 248 View Post
hows everyone mounting there elecs,i put my orion speedo under and reciver on top plate like pics but its horrible for routing wiring to battery plugs unless i re soldier new wires and put plugs towards front of car and reciver sits very high with wiring,rather keep lower center of gravity..??
O and im running full pack..
you could make a mount similiar to the one i made, but since you are running a full pack you would probably have to put some bends in the lexan so it mounted flat so your battery will fit under the reciever tray
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Old 09-30-2012, 10:33 PM   #832
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Have a question. What size big bores come with this kit? Like AE's new b44.2 comes with 12mm. All i can find is 38mm
12mm as well.
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Old 10-01-2012, 12:45 AM   #833
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Quote:
Originally Posted by BISBEE 248 View Post
hows everyone mounting there elecs,i put my orion speedo under and reciver on top plate like pics but its horrible for routing wiring to battery plugs unless i re soldier new wires and put plugs towards front of car and reciver sits very high with wiring,rather keep lower center of gravity..??
O and im running full pack..
Had to resolder 14 gauge wires on my speedo to get it to fit right. 12 gauge wires didn't really play all that nice.
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Old 10-01-2012, 01:30 AM   #834
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I just clipped off the rear battery stops so I could slide the ESC forward a few mm. I also mounted my Rx along the side if the battery in the traditional spot. Just had to stack up about eight layers of servo tape to build a flat spot. It takes patience but the layout looks great and balances out the capacitor on the other side. I'll post a pic when I get a chance.
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Old 10-01-2012, 01:35 AM   #835
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Quote:
Originally Posted by jpcopeland1 View Post
What setup do you currently have on yours? Chris (local Kyosho Privateer) put the UM521-1 rear arms on his car and loves it now.
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Originally Posted by jpcopeland1 View Post
I have the UM521-1 arms on order. Will do a back to back run on them and see what the "feel" difference is between the two.
Chris is probably running Tebo's ROAR Nats setup, which uses UM521-1 and 0.5* hubs. He also used the short eyelets so there's almost no droop on the car. That's how he likes it but you'll get a lot of chassis slap off the big jumps. Depends on your track. It's worth trying. I think most of the team drivers are still playing around with setup because they all got their kits last week.
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Old 10-01-2012, 04:26 AM   #836
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Anyone know the difference between the um521 and the um521-1 ?
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Old 10-01-2012, 04:55 AM   #837
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is the stock spur a 76?
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Old 10-01-2012, 05:03 AM   #838
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the 521-1 has 1 hole in the middle of where the 2 holes are on the 521
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Old 10-01-2012, 06:15 AM   #839
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Quote:
Originally Posted by mdowney View Post
Chris is probably running Tebo's ROAR Nats setup, which uses UM521-1 and 0.5* hubs. He also used the short eyelets so there's almost no droop on the car. That's how he likes it but you'll get a lot of chassis slap off the big jumps. Depends on your track. It's worth trying. I think most of the team drivers are still playing around with setup because they all got their kits last week.
At the track yesterday the team guys were running the longer rear eyelets on the shocks. FYI And yes they are running the upgraded aluminum rear .5* hubs.
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Old 10-01-2012, 06:16 AM   #840
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is the stock spur a 76?
Yes
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