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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 01-15-2014, 01:16 PM   #9391
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Originally Posted by Speedychris22 View Post
Which pistons?
whats your track conditions
trcr. avid machined taper pistone. 3x1.4 front 32wt / 2x1.6 rear 27.5 ae oil
indoor clay, medium-high traction, a big tripple, whoops, doubledoubles, sweeper, off camber turns. wet in the morning, tire squeeling traction at night.
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Old 01-15-2014, 01:27 PM   #9392
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trcr. avid machined taper pistone. 3x1.4 front 32wt / 2x1.6 rear 27.5 ae oil
indoor clay, medium-high traction, a big tripple, whoops, doubledoubles, sweeper, off camber turns. wet in the morning, tire squeeling traction at night.
Ryan, does Scott sell those pistons or did you order them online? Might try them Friday if he stocks them.
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Old 01-15-2014, 01:36 PM   #9393
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Have a link to the 5 hole piston?
they are the stock pistons that come with the kit
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Old 01-15-2014, 02:19 PM   #9394
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they are the stock pistons that come with the kit
These??

http://www.amainhobbies.com/product_...k-Piston-Set-2
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Old 01-15-2014, 02:54 PM   #9395
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yes those are them
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Old 01-15-2014, 07:47 PM   #9396
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Ryan, does Scott sell those pistons or did you order them online? Might try them Friday if he stocks them.
Yeah I get most of my stuff through him, I have him order if he dosent have it most stuff takes 3-5 days to arrive, same as amain or speedtech. I rather give him the business.
The 3 hole pistons are the associated and the 2 hole are the avid. They are both machined and have the same exact fit.
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Old 01-16-2014, 01:07 AM   #9397
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Hi guys,

I bought a RB6 yesterday from a friend, brand new with a gear diff still in the package. I build the geardiff yesterday to try it on a smooth indoor carpet track.
I've build a lot of diffs (for 1/10 and 1/8 cars) and this is the first diff that isn't smooth. I can feel the gear moving when I turn the outdrive with my hand because the gearmesh is so tight.
I didn't add any extra shims. Just the 2 that cover the O rings.

Do I need to add an extra gasket to make it free? Or does it free up after a few runs?
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Old 01-16-2014, 01:18 AM   #9398
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Hi guys,

I bought a RB6 yesterday from a friend, brand new with a gear diff still in the package. I build the geardiff yesterday to try it on a smooth indoor carpet track.
I've build a lot of diffs (for 1/10 and 1/8 cars) and this is the first diff that isn't smooth. I can feel the gear moving when I turn the outdrive with my hand because the gearmesh is so tight.
I didn't add any extra shims. Just the 2 that cover the O rings.

Do I need to add an extra gasket to make it free? Or does it free up after a few runs?
Mine felt the same way. It will break in and feel buttery smooth.
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Old 01-16-2014, 03:09 AM   #9399
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jason, i saw your blog... very helpful...how are you holding down your battery w/o the holder?

are all the carbon parts like shock towers, arms and knuckles necessary? does that affect the peformance greatly or would the stock parts suffice?

I am making a trip out to CA at the end of the month and plan to visit OCRC for a wed night club race.

thanks in advance...

Justin
Battery held down with 3M automotive double sided tape (grey color).

The carbon parts are much lighter, so if you're trying to cut weight then yes they're necessary.

I am usually at OCRC on Wednesday, feel free to stop by and say hi, I'll go over your car with you as well.
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Old 01-16-2014, 04:03 AM   #9400
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Got a front tyre question, do many of use aka inserts with proline tyres, the proline inserts are huge and i gathered you just cut them in half?? I run on a pretty blown out loose track and would like your guys opinion. Ive got a set of aka 3 rib and a set of holeshots for the front. What handling characteristics will the buggy have? Not real familiar with 1/10th tyre setups. Thanks for help.
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Old 01-16-2014, 06:36 AM   #9401
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Originally Posted by FallenAllDay View Post
Got a front tyre question, do many of use aka inserts with proline tyres, the proline inserts are huge and i gathered you just cut them in half?? I run on a pretty blown out loose track and would like your guys opinion. Ive got a set of aka 3 rib and a set of holeshots for the front. What handling characteristics will the buggy have? Not real familiar with 1/10th tyre setups. Thanks for help.
3 ribs tend to be smooth and not turn in so tight. I run on loose dirt but hard packed weekly and they work great. The holeshot front normally too aggressive and can never find traction. If your looking for an in between tire then the 2 you have try a barcode or handlebar front tire....
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Old 01-16-2014, 08:39 AM   #9402
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What's the best mid motor body?
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Old 01-16-2014, 08:57 AM   #9403
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Anyone know where I can get a aluminum shock tool ? This cheap shock tool stripped out on me and now I can get it off to change my oil this has to be the cheapest crap I ever seen on a high end kit.. my losi came with a nice tool but the shock on the rb6 is nice

Anyone have any tips to remove it without using the shock tool?
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Old 01-16-2014, 08:59 AM   #9404
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Default Shock tool

AVID

www.avidrc.com
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Old 01-16-2014, 09:21 AM   #9405
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Originally Posted by iMarky View Post
Anyone know where I can get a aluminum shock tool ? This cheap shock tool stripped out on me and now I can get it off to change my oil this has to be the cheapest crap I ever seen on a high end kit.. my losi came with a nice tool but the shock on the rb6 is nice

Anyone have any tips to remove it without using the shock tool?
Your putting them on to tight... (unless the bigbore tool is worst than the small shock tool)
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