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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 01-22-2013, 11:36 AM   #4576
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Anyone know a trusted shop where they have both aluminium wide rf and rr suspension holders in stock? It seems as though they are out of stock everywhere (amain,stormer,speedtech,mammoth etc)
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Old 01-22-2013, 01:17 PM   #4577
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My 2 cents: I thought I would really like the RB6 mid motor on carpet. I was wrong. It was very "neutral/boring" if that makes sense. This was with shorty pack/low profile servo.
Switched to rear motor. Left in shorty and lp servo and it was like the buggy came alive. My lap times came down with rear motor. Hope this helps anyone who is thinking mid motor.
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Old 01-22-2013, 01:28 PM   #4578
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My 2 cents: I thought I would really like the RB6 mid motor on carpet. I was wrong. It was very "neutral/boring" if that makes sense. This was with shorty pack/low profile servo.
Switched to rear motor. Left in shorty and lp servo and it was like the buggy came alive. My lap times came down with rear motor. Hope this helps anyone who is thinking mid motor.
Not all carpet tracks are high grip which means that mid motor is not always the way to go when racing on that surface. If your track is not high grip it makes sense that rear motor was better. However may I suggest to try again the mid motor layout with the saddles istead of the shorty? They will generate more grip in general
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Old 01-22-2013, 02:15 PM   #4579
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Could someone please post some picks of there mid motor layout with the shorty or saddle combo. Is anyone having good results with the mid motor. I am in the process of a mid motor build and am open to ideas and feedback. Thx Ryan
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Old 01-22-2013, 02:20 PM   #4580
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Could someone please post some picks of there mid motor layout with the shorty or saddle combo. Is anyone having good results with the mid motor. I am in the process of a mid motor build and am open to ideas and feedback. Thx Ryan
What is the traction like at your track? (1 being a dusty loamy dirt track, and 10 being ultra high traction carpet)
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Old 01-22-2013, 02:23 PM   #4581
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10 some people are running slicks. Common tire on a loose day would be bar codes.
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Old 01-22-2013, 02:26 PM   #4582
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Originally Posted by Flyin Ryan View Post
Could someone please post some picks of there mid motor layout with the shorty or saddle combo. Is anyone having good results with the mid motor. I am in the process of a mid motor build and am open to ideas and feedback. Thx Ryan
I know of a local who runs a mid-motor rb6 in stock with great results, and I've also driven another mid-motor rb6 and it drove really well. With rear motor you might have a little more forward bite which would be needed for mod but for stock you're fine. Mid motor gets a bad name, just try it and see if it works for you.
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Old 01-22-2013, 02:29 PM   #4583
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I hope you didn't leave the same springs on the car and hope it would preform? The stock springs etc are for rear motor you can't just slap on any ol' setup on the car and expect the car to do work..

This type of thinking is why everyone sells there car off a week after they get it
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Old 01-22-2013, 02:52 PM   #4584
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I hope you didn't leave the same springs on the car and hope it would preform? The stock springs etc are for rear motor you can't just slap on any ol' setup on the car and expect the car to do work..

This type of thinking is why everyone sells there car off a week after they get it
well said, and that also goes for rear motor, you cant just toss a setup on it that you found online and expect it to be dialed, any setup you use will still need to be taylored to your driving style
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Old 01-22-2013, 03:07 PM   #4585
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Most of us in Europe use it mid motor, lots of RB6 here and really performing well so I think this was a setup issue, especially considering mid can't be setup like a rear motor at all to perform well.
Lots of work to be done on shocks and wheelbase among others to balance grip and steering, driving is also very different as it's all about carrying corner speed.
You need to add weight too if you run with a lp servo and shorty, most add between 30 to 50g under lipo with a shorty.
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Old 01-22-2013, 03:10 PM   #4586
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10 some people are running slicks. Common tire on a loose day would be bar codes.
10 out of 10?... without knowing any other details, mid motor may produce faster lap times. The key is looking at the track, and seeing if there are places where you need to get on the gas hard, and from a slow speed, or from a stop. If a mid motor car can't be kept from breaking rear traction due to the layout, causing you to step out... RM will probably be faster. Video of track?
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Old 01-22-2013, 03:38 PM   #4587
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You can look the tracks up on youtube. either spacecoast rc cocoa fl or holeshothobbies sanford fl. I have an rb5 rear mount. Just interested in the mid motor. Thx for all of the advise and feedback. I will update later on my results and feelings towrds the car. I know that a few of the guys are running mid motor losis and they look really good. Just curious is all. So far I have not heard are negative comments on the mid motor. I have not talked to anyone with positive feedback on it. You guys were a big help. I still need to try it just to see.LOL
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Old 01-22-2013, 04:11 PM   #4588
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Originally Posted by Flyin Ryan View Post
You can look the tracks up on youtube. either spacecoast rc cocoa fl or holeshothobbies sanford fl. I have an rb5 rear mount. Just interested in the mid motor. Thx for all of the advise and feedback. I will update later on my results and feelings towrds the car. I know that a few of the guys are running mid motor losis and they look really good. Just curious is all. So far I have not heard are negative comments on the mid motor. I have not talked to anyone with positive feedback on it. You guys were a big help. I still need to try it just to see.LOL
Talk to Billy Bruce, he's out at those two tracks all the time and has a pretty dialed mid motor RB6. I believe he finished second at Super Cup in stock with his mid motor (out of 55 or so in the class).
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Old 01-22-2013, 05:14 PM   #4589
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So looking at the MIP CVD's for the Rb6, I noticed the locknuts are now SaE instead of the Metric Locknut? Thats kind of a bummer.

http://miponline.com/store/mip12141.html
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Old 01-22-2013, 05:30 PM   #4590
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So looking at the MIP CVD's for the Rb6, I noticed the locknuts are now SaE instead of the Metric Locknut? Thats kind of a bummer.

http://miponline.com/store/mip12141.html
#99010 NUT/ M4 x .7 Steel Locknut (6)
$3.50 691545990101

Dont think they would do that to us! I ordered mine still not shipped from MIP.
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