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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 10-27-2012, 06:02 AM   #2131
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Originally Posted by aloksatoor View Post
On a side note, never had trouble with the rango ball diff esp with bfast kits.
Heh. I had nothing but trouble with the rango balldiff. Probably just user error though
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Old 10-27-2012, 06:48 AM   #2132
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Had the rango. Hated it. Got a used rb5 and even without tuning it, was way way better than the rango. the shocks itself put it a cut above the rest. Building my rb6 tomorrow but if the older ones better than the rango then for sure this woudl be too . Go for it.

On a side note, never had trouble with the rango ball diff esp with bfast kits.
When I had my DEX210, first thing I did was put a B-Fast diff in it (stock diff was horrible, one chirp and it was gone). Never rebuilt it in the whole 5 months I had the car. Very nice kit, for a very sub par rear motor car.
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Old 10-27-2012, 11:22 AM   #2133
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Since the RB6 is about the same wheelbase and length as the RT5 has anyone thought about or tried converting their RT5 to a mid mount configuration using RB6 parts?
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Old 10-27-2012, 11:25 AM   #2134
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Originally Posted by Chris-s View Post
Considering picking up an RB6 to replace my 210, as I'm finding the 210 poor in low traction conditions (grip/balance) and in high grip the ball diff isn't up to the job (gear diff is slower!) and is inconsistent (but still quicker than gear diff!)

Looking to hear from people who have either tried both or have made the switch themselves. Did your laptimes fall and become more consistent?
The RB6 is considerably better than the 210 in all areas of measurement, except for one... and that is the ball diff. The dex210 is the worst car, with absolutely the best ball diff on the 1/10th market. (I would place the kyosho ball diff in a distant second).

Regardless, the RB6 is a better car all around. Just find somebody that has one dialed in to your track, and ask to drive it.
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Old 10-27-2012, 12:19 PM   #2135
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Default Internal gear ration

Anybody know the internal gear ratio in rear motor config?
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Old 10-27-2012, 01:35 PM   #2136
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Anybody know the internal gear ratio in rear motor config?
That is an interesting question, does adding the extra gear change it from 2.6?
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Old 10-27-2012, 01:36 PM   #2137
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Originally Posted by mike_d View Post
Since the RB6 is about the same wheelbase and length as the RT5 has anyone thought about or tried converting their RT5 to a mid mount configuration using RB6 parts?
RT6. Just add aluminum chassis and front end bits..... I love my RT5 just the way it is. If they do work on a new truck I hope they only change the chassis. Everything else is just fine the way it is.
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Old 10-27-2012, 01:38 PM   #2138
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Originally Posted by jpcopeland1 View Post
That is an interesting question, does adding the extra gear change it from 2.6?
Gear ratio does not change if you add the extra gear. They are the same tooth count, so no ratio change.
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Old 10-27-2012, 01:39 PM   #2139
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Originally Posted by jpcopeland1 View Post
That is an interesting question, does adding the extra gear change it from 2.6?
I'm not sure, but I don't think so...just wasn't sure.
So the 3 gear tranny is 2.6? What's the formula for that?
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Old 10-27-2012, 02:23 PM   #2140
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Originally Posted by aloksatoor View Post
The second one is butter. Mine bent too easily.
Don't get it in the kit form instead order 6 of the thicker 3.5mm version rather than the 3.0mm. http://www.amainhobbies.com/product_...-Turnbuckles-4.

Do not go for the longer ones they will not work with the kyosho long ends. You will have to order the shorter ones instead from kyosho for the lazer or something.
Will the rod ends still work the the thicker rods?
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Old 10-27-2012, 03:01 PM   #2141
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Originally Posted by jpcopeland1 View Post
RT6. Just add aluminum chassis and front end bits..... I love my RT5 just the way it is. If they do work on a new truck I hope they only change the chassis. Everything else is just fine the way it is.
I love my RT5 as well and although it works fantastic on dirt it doesn't always work well on Astroturf/carpet tracks. That is why i was looking to try a mid motor configuration like a lot of the guys in europe do. Seems to work well for them. Obviously it will take more than just the chassis and front end parts won't it? What about the 4 gear tranny, etc...?
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Old 10-27-2012, 03:07 PM   #2142
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Wonder why the dropped the RB5 WC vented slipper from the RB6. I know it shares same slipper parts as FS, so cost saving..?

Anyone using vented slipper? Also been mentioned that some are upgrading the motor plate.
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Old 10-27-2012, 03:26 PM   #2143
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Wonder why the dropped the RB5 WC vented slipper from the RB6. I know it shares same slipper parts as FS, so cost saving..?

Anyone using vented slipper? Also been mentioned that some are upgrading the motor plate.
I have both the vented slipper, and vented motor plate. Keeps my motor maybe 5 degrees cooler then stock. More for bling factor for me.
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Old 10-27-2012, 03:29 PM   #2144
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Originally Posted by mike_d View Post
I love my RT5 as well and although it works fantastic on dirt it doesn't always work well on Astroturf/carpet tracks. That is why i was looking to try a mid motor configuration like a lot of the guys in europe do. Seems to work well for them. Obviously it will take more than just the chassis and front end parts won't it? What about the 4 gear tranny, etc...?
It wasn't really designed for mid motor, just like the 22 has mid-motor as an afterthought and the DEX210 is a mid-motor car with rear motor as an afterthought.

Of course it will take more then what I mentioned, but I was talking about a rear motor car. I don't have any tracks near me where it is worth the time investing resources to try and get mid motor working on the 6. Although out of the 3 rear/mid motor cars the Kyosho would probably be the easiest to find a mid motor setup for. Maybe Hot Rod Hobbies on a blue grooved track it would work.
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Old 10-27-2012, 03:33 PM   #2145
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Originally Posted by jpcopeland1 View Post
It wasn't really designed for mid motor, just like the 22 has mid-motor as an afterthought and the DEX210 is a mid-motor car with rear motor as an afterthought.

Of course it will take more then what I mentioned, but I was talking about a rear motor car. I don't have any tracks near me where it is worth the time investing resources to try and get mid motor working on the 6.
I hear you. I was just curious if it was possible without breaking the bank just because I would like to try it to see how it would handle. By no means am I unhappy with my RT5 it's still an amazing truck! Thanks anyways and sorry for highjacking, back to the RB6 talk!!!
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