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Kyosho Ultima RB6 & RB6.6 Car Thread

12-21-2016, 08:46 AM - Wikipost

R/C Tech ForumsThread 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

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New RB6.6 parts (compared exploded views, prices and links are Kyosho America):

Chassis:

Main chassis - UM731 - $125.99
Side guards - UM732 - $9.99

Battery Holder:

Battery plate - UM733 - $8.99
Battery foam - UM741 - $7.99

Rear Bulkheads:

MM3 and Laydown - UM740 - $9.99
- MM3 bulkhead
- Laydown bulkhead
- Swaybar Holders

3 Gear Transmission (MM and RM):

Transmission - UM734 - $10.99
- transmission cases
- spacers
- caps
- plastic FR & RR suspension hangers
Gear Cover - UM735 - $6.99

Laydown Transmission (3 and 4 gear possible):

Transmission - UM736 - $10.99
- transmission cases
- spacers
- caps
- required extra hardware
- pastic FR suspension hanger
40T idler - UM737 - $6.99
Motor plate - UM738 - $18.99
Gear cover - UM739 - $6.99

Body:

Blade body - UMB05 - $27.99

Optional Parts:

Lightweigt Blade body - UMB05LW - $31.99
Aluminum FR suspension hanger - UMW705B - $28.99 (may be able to file UMW705 to fit)
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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04-05-2013, 10:01 PM

#6076

Cpt.America

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If it "loses traction big time", you have a setup "issue"... like.. your rear tires are on backwards (you rotated them on accident), or you have a bind of some kind.

04-05-2013, 10:46 PM

#6077

silvalis

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Probably easiest to post your actual setup...

04-05-2013, 11:53 PM

#6078

IRM616

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so i ran my buggy when full day and the rear end of chassis has a small dent . ppl say its a common issue. can anyone provide me with more info?? thanks

04-06-2013, 01:35 AM

#6079

Jetboat_Jake

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Quote:

Originally Posted by nitroargi

Are you still using the stock springs? If so try Gold rear...

Do you know where I could purchase the golds for the rears? Sold out at both of my local hobbyshops. I will post a setup sheet soon. I purchased the flat rear arms because I heard they help traction big time, but i do not know which outer pins I need??

04-06-2013, 03:26 AM

#6080

silvalis

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Quote:

Originally Posted by IRM616

so i ran my buggy when full day and the rear end of chassis has a small dent . ppl say its a common issue. can anyone provide me with more info?? thanks

The early versions were thinner underneath the gearbox, leaving a small space there. Current versions are slightly thicker.

It's not worth worrying about. I've been running my release-day-kit since release with the dent (day 1 too) and it hasn't worn through or been worth bothering with. I'm sure others are in the same boat.

If you really want to worry about it, go back a few hundred pages and read up on how to chop the T plate down to 'fill in' the space.

04-06-2013, 07:58 AM

#6081

Turbo911

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Quote:

Originally Posted by Jetboat_Jake

LA229 is the outer pin for 521 and 521-1 arms.

04-06-2013, 11:30 AM

#6082

Life_livin

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Just switched over from a B4.2 to a RB6 and got its first run in last night grabbing 4th in 17.5, all I can say is WOW. Really looking forward to improving it even more and I would also like to thank all of you for this great thread!

04-06-2013, 11:41 AM

#6083

vr6cj

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Quote:

Originally Posted by Life_livin

o yeah, where did u go racing? LSR?

04-06-2013, 11:47 AM

#6084

Life_livin

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Yeah went down there with Brian. Their current layout is my favorite so far its sick.

04-06-2013, 05:33 PM

#6085

silvalis

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People using the lunsford stuff: How much weight did this chop off?

04-06-2013, 08:16 PM

#6086

pekow91

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Hey guys I am still having issues with my transmission/diff. I recently rebuilt the diff and transmission with new balls, gears and rings with the proper lube. My issue is that I am getting this grinding sound at low speeds. At higher speeds the noise goes away. I attached a video.