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Kyosho ST-RR

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Old 10-19-2017, 10:14 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Kyosho ST-RR
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Last edit by: tobamiester
Current running upgrades/Mods people are doing to this truck late 2016/early 2017.

-Chassis Options
m2c2850 KYOSHO STRR EVO WEIGHT FOWARD TRUGGY

-Engine Mount Option
IFW102 - Blue narrower Mount. Allows you to put Lock Nuts on top of screws that hold the Mount plates in.
Agama motor mount AGM6206

-For MP9 Knuckle conversion
Kyosho IF419 MP9 Knuckles
Kyosho IFW436 16degree Hub Carrier
Kyosho IF420 Knuckle Arm Collar (slightly thinner than STRR one)
Kyosho IF467 Long King Pin

-Strengthening upgrades
King Headz KP-360-BLK Front Torque Arm
King Headz KP-372RR-BLK Rear Torque Arm (extended chassis)
King Headz KP-300LB-BLK Lower Front Holder B
King Headz KP-300UL-BLK Front Upper Holder L
King Headz KP-329 Rear Brace Mount
IS157 Hardened Diff Case from Psycho Kruiser
IGW002GM Alum Rear Hubs
HB Outdrives #67197

-Replacing C-Clip Hinge Pins on Inner Susp Holder
HPI 109848 Hing Pins
Racers Edge/KFactory RCEK8034 Pins (Very hard to find)
or
Replace complete A/B/C/D Blocks with:
*M2C m2c2510 KYOSHO ST-RR/ EVO REAR TOE BLOCK
*M2C m2c2520 KYOSHO STRR EVO TRUGGY FRONT LOWER ANTIDIVER KIT


-Servo Saver Mod
IFW450 MP9 SS Alum Upper Arm
IF417 MP9 SS Lower Assembly

(See http://www.rctech.net/forum/showpost...postcount=4112 for full pics and description).


-Performance Updates
IFW327BL Blue Narrow Hexes (typically run on front).

-Bodies Options
RC8T Bulldog Body (discontinued late 2016).

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Old 09-25-2008, 09:22 AM
  #181  
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Originally Posted by MercyRev
what are the correct st-rr shock shaft lengths?

Thank you


Taken from the STRR Manual:


Rear Shock:

IF337

http://www.amainhobbies.com/product_...oducts_id/4068

Front Shock:

IFW141-02

http://www.amainhobbies.com/product_...oducts_id/6165
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Old 09-25-2008, 09:26 AM
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Originally Posted by KendallWelch
I am not sure on why we use heavier oils than other companies, but I can tell you the truck works with that wt. oil. Typically if the track is smooth I run 750(f)/900(r), but if the track is really blown out I will go to 750/800. 900 in the front seems too stiff IMO, but they were at the Nitro Pit with that setup, and that track had many large jumps from what I could tell. Most of the time drivers run thicker oil on a smooth, high speed track.

As far as Kyosho to Losi conversion in shock oil... I ran 60wt. for Kyosho 900cts, it is very close.

If you are on a tight track, I would go 750/900. But thats just me.

Hope this helps.

Crash- I have ran a GO .25 in my RR with an 086 pipe. Works great, no problems yet.


Thanks Kendall. I will try the 750/900 shock setup first and go from there. So I'm assuming that's about a 45/60wt setup in Losi right?

Also I was planning on maybe a 10/15/2 diff setup as well since I don't drive "punched" all the time like everyone says Lutz does.
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Old 09-25-2008, 12:39 PM
  #183  
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Originally Posted by MattP
Thanks Kendall. I will try the 750/900 shock setup first and go from there. So I'm assuming that's about a 45/60wt setup in Losi right?

Also I was planning on maybe a 10/15/2 diff setup as well since I don't drive "punched" all the time like everyone says Lutz does.
No, Losi 45 is about 650 cps (kyosho), Losi 50 is about 750, Losi 60 is about 950....The WT scale is not linear like the cps (or cts) scale. Most STRR guys run heavier oil in the rear. I ran 600f and 700 rear most of last year (blue springs), this year I went to 700f and 800r, and now I am at Losi 45f and Losi 50r (blue springs). I usually run 7/15/3 for my diffs...the 10 in front would give you more on power steering and help pull the car through turns more then the 7k up front

Last edited by gtsum; 09-25-2008 at 04:11 PM.
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Old 09-25-2008, 01:03 PM
  #184  
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What's anybodies opinion on running zero offset hubs with half offset wheels on your ST-RR's? I've got a couple sets of JC Rulux Half-ups (half offset), and have them set-up with kyosho zero offset hubs. haven't had a chance to run it yet (New track being built), so am just looking for any advice about how it may affect (If at all) the handling of the truggy

Cheers
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Old 09-25-2008, 01:20 PM
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Originally Posted by mtbkym01
What's anybodies opinion on running zero offset hubs with half offset wheels on your ST-RR's? I've got a couple sets of JC Rulux Half-ups (half offset), and have them set-up with kyosho zero offset hubs. haven't had a chance to run it yet (New track being built), so am just looking for any advice about how it may affect (If at all) the handling of the truggy

Cheers
buddy of mine ran his that way this past weekend and it worked well..it narrowed the truck a bit and made it a little more nimble and agile. The stability did not seem to be affected much either (small to medium size track)
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Old 09-25-2008, 01:57 PM
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Originally Posted by gtsum
No, Losi 45 is about 650 cps (kyosho), Losi 50 is about 750, Losi 60 is about 950....The WT scale is not linear like the cps (or cts) scale. Most STRR guys run heavier oil in the rear. I ran 600f and 700 rear most of last year (blue springs), this year I went to 700f and 800r, and now I am at Losi 45f and Losi 50r (blue springs). I usually run 7/15/3 for my diffs...the 10 in front would give you more off power steering and help pull the car through turns more then the 7k up front

Ok thanks for clarifying that for me.......
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Old 09-25-2008, 04:12 PM
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I mistyped above...10k front would give more ON power steering and less off power steering then 7k front...the 10k would pull the car through the corners a bit more
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Old 09-25-2008, 04:59 PM
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I have a Ninja .21 that I run most of the time with 18/22/2 diffs. Last weekend it developed a leak and I had to put in a AB Mods Ninja .28. This engine is insane for power but I can't get it to the ground. The backend looses traction and fishtails. Should I use a heaiver weight in the centre or front to get the truck to pull?
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Old 09-25-2008, 06:25 PM
  #189  
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MattP- I run 52.5 wt losi in the front, I thought it was closest to 750. I think it was between 50 and 52.5.

10/15/2 should be good for the diffs. If you need more off power steering and the truck isn't going through the bumps as well as it could, I would go down to 12 in the center.
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Old 09-27-2008, 05:21 PM
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I've got a question about the diff shimming.

Do most people just shim the diffs once initially and then never reshim or do the newer chromoly gears need to be checked all the time like on the original str?

I remember when I had my old str I always pulled the diffs apart after every race to check the mesh and wear pattern on the gears.
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Old 09-27-2008, 06:10 PM
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Originally Posted by MattP
I've got a question about the diff shimming.

Do most people just shim the diffs once initially and then never reshim or do the newer chromoly gears need to be checked all the time like on the original str?

I remember when I had my old str I always pulled the diffs apart after every race to check the mesh and wear pattern on the gears.
I shimmed the diffs once till it fits with just a tiny bit of slack. Check the mesh after race and see if re-shim is needed. So far, I've not needed to make any changes to the shimmings....
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Old 09-27-2008, 06:31 PM
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That sounds good. About how much fuel do you think you have through your strr?
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Old 09-27-2008, 07:30 PM
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About 2 1/2 gallons
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Old 09-27-2008, 09:40 PM
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guys anybody have problem with the front lower hinge pin(steering knuckle side) keep coming off, i dont thing the c clip could hold enough,
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Old 09-28-2008, 01:03 AM
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If the c-clips are popping off a dab of shoe goo on the clip does wonders for keeping them in place.
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