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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
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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 06-06-2013, 08:33 AM   #7111
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Looking for feedback from anyone who has done a back to back test between the 521-1 arms and stock RB6 arms. What were your impressions.

I was also curious as to if anyone else could confirm my findings when comparing wide hangers vs narrow.

Narrow Hangers - I felt the car was a little free entering a turn but would have more grip when accelerating out of the turn. The car bounced around a little bit more than usual over the small bumps.

Wide Hangers - I felt the car had more grip, namely side bite, when entering a turn. If you got on the throttle to hard, you would break loose and the rear could wash out. I didn't notice the car getting upset over the smaller bumps

Anyone who has run the B4 platform, I almost compare the feel of Narrow hangers to C hub tower and wide hangers to A hub towers.

Looking forward to hearing your thoughts.
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Old 06-06-2013, 08:45 AM   #7112
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yeah, narrow should have you more forward bite. but wide will be more stable in the bumps. same thing as the sc10 with normal wheels and +3 offset wheels. I really liked the wide hangers on my rb6. I had no desire to tun rb5 parts on mine, plus it was so planted and so smooth that I never felt a need to change it. But then again, i dont rip it out of the corners, I roll in and roll out.
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Old 06-06-2013, 08:52 AM   #7113
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I have not tried the wide yet but am going to install them today. Your info all sounds accurate.
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Old 06-06-2013, 08:56 AM   #7114
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I have never tried the RB6 arms. I have them. I just have been using the 521-1 arms. I also have the RB5 front axles / hexs to try too.
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Old 06-06-2013, 09:00 AM   #7115
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Quote:
Originally Posted by Posvar View Post
I have not tried the wide yet but am going to install them today. Your info all sounds accurate.
This would explain why I prefer the narrow hangers then. I couldn't stand the A towers on the AE car LOL.
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Old 06-06-2013, 09:06 AM   #7116
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I like how my car feels with narrow but have had a nip set of kyosho gun
Metal wides for months and figure I would try them.
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Old 06-06-2013, 09:42 AM   #7117
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Quote:
Originally Posted by Bob Barry View Post
Looking for feedback from anyone who has done a back to back test between the 521-1 arms and stock RB6 arms. What were your impressions.
I tried the 521-1's for about three weeks and switched back to the stock arms. Once I get a chance I plan to run them back-to-back on the same day and would like to actually install one on each side on the bench just to measure the relative droop as a starting reference. Even with the recommended shock lengths and eyelets the RB5 arms just haven't quite worked for me aside from one track surface which was medium bite indoor. They'll get another chance at some point, but I really like my (mid-motor) car with the kit arms right now. I'm not expecting any groundbreaking differences either way.
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Old 06-06-2013, 10:09 AM   #7118
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Quote:
Originally Posted by Bob Barry View Post
Looking for feedback from anyone who has done a back to back test between the 521-1 arms and stock RB6 arms. What were your impressions.

I was also curious as to if anyone else could confirm my findings when comparing wide hangers vs narrow.

Narrow Hangers - I felt the car was a little free entering a turn but would have more grip when accelerating out of the turn. The car bounced around a little bit more than usual over the small bumps.

Wide Hangers - I felt the car had more grip, namely side bite, when entering a turn. If you got on the throttle to hard, you would break loose and the rear could wash out. I didn't notice the car getting upset over the smaller bumps

Anyone who has run the B4 platform, I almost compare the feel of Narrow hangers to C hub tower and wide hangers to A hub towers.

Looking forward to hearing your thoughts.
Seems accurate to my testing.
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Old 06-06-2013, 10:29 AM   #7119
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Narrow hangers locked in the rear a bit for me and I am faster into and out of the corners without a doubt. Feel most similar to my b4

Last edited by ryanpatrickgore; 06-06-2013 at 10:31 AM. Reason: Spelling
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Old 06-06-2013, 10:40 AM   #7120
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Thanks for the feedback.

once I get the rear end settled, I'll start working on the front. From what I can tell, the only difference I have there will be the links and castor. I have middle hole on the bulkhead vs outer hole. And I have 25 / 0 castor vs 25 / 4 castor. This is in comparison to the std Japanese setup that was recommended. I'll have to go over all of the washers and ball studs in more detail too just to make sure I don't have anything goofy going on there.
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Last edited by Bob Barry; 06-06-2013 at 11:01 AM.
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Old 06-06-2013, 10:45 AM   #7121
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I'm running 30* but am going to try 25* this weekend again. I have been happy with the 30 but quite a few dudes here are running the 25* and they are dialed as well.
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Old 06-06-2013, 11:01 AM   #7122
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ahh yeah I should have clarified that. I have 25/0 vs 25/4.
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Old 06-06-2013, 11:20 AM   #7123
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I've ran 30-0, 30-2 30-4. The 30-0 feels the best for my track. Sooo... I'm going to keep going down an test more. I did run 25-0 and 25-4 but that was before the care was really dialed in, soon after I had bought it. I have had alot of time with the car now and this is one if the last things I want really play with.
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Old 06-06-2013, 11:52 AM   #7124
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Quote:
Originally Posted by JiuHaWong View Post
Do you have a link to the ones Capt. uses?
I dont have a whole lot of info since I havent ran them. I think they are off the ultra shock from a stampede or slash I think.... Not sure

The Kyosho X-rings have been working great for me no issues.
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Old 06-06-2013, 11:56 AM   #7125
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Quote:
Originally Posted by gelshocker View Post
I meant see if they have the V2s already. They did not receive the V1s after being notified were discontinued. Cheers,
got it, The V2's should be in Kyosho America later this month so anytime.
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