Like Tree9Likes

Kyosho MP10T

Reply

Old 08-02-2019, 07:53 PM
  #16  
Tech Addict
iTrader: (17)
 
fiveoboy01's Avatar
 
Join Date: May 2008
Location: Waunakee, WI
Posts: 735
Trader Rating: 17 (100%+)
Default

Originally Posted by hyperfuxx View Post
I can see people bending the back half of the chassis
I have a different brand truggy with a similarly long, skinny rear chassis with a brace. No issues.
fiveoboy01 is offline  
Reply With Quote
Old 08-03-2019, 04:15 PM
  #17  
Tech Elite
iTrader: (125)
 
Join Date: Jun 2012
Location: The 808
Posts: 2,696
Trader Rating: 125 (99%+)
Default

And I thought Tekno had unique/interesting body designs...
BJT2814 is offline  
Reply With Quote
Old 08-04-2019, 06:17 AM
  #18  
Tech Regular
iTrader: (3)
 
uDi_MP7.5's Avatar
 
Join Date: Jun 2003
Posts: 487
Trader Rating: 3 (100%+)
Default

Originally Posted by iplaygames View Post
how about we discuss xrays pinion bearing systems over the years? 3 big bearings used to fail all the time, they changed to smaller and not so many issues
actually kyosho proved this with the original truggy/ST-RR, the case was soft and warped with the heat of spiral geears, changed to a harder plastic and straight cut evo gears and fixed itself...
Happy to.
You seem to assume I have some kind of brand loyalty, I don't. That's a great way to be locked into manufacturers' poor decisions.
Xray's 3-bearing design ('08-'10) was terrible - for seat design reasons - not because of bearing size - 4mm section bearings actually have smaller balls, peak bearing ratings are a function of all dimensions not just the OD.
However, Xray learned from their mistake (9 years ago), and from '11-'19 inclusive they use 8x16x5 for all diff pinion bearings. They also ran the same setup on the original XB8 from '04-'06.

Kyosho on the other hand had the right idea from the MP6 days right through to the MP777, but with the latest generations MP9 and MP10 the pinion bearings are undersized and result in either shorter maintenance intervals or faster diff pinion wear. Every brand makes bad decisions - but all that matters is the lessons learned and whether they are applied in the latest iteration.

FYI, The ST-RR you mention is based on the now-ancient MP777 (not MP9), thus 8x16x5 bearings.
The MP10T (if running 5x11x4) will bring new and exciting problems.
Originally Posted by windellmc View Post
Seems to work ok for Mugen and maybe X-ray?
Mugen is 6x13x5, Xray is 8x16x5. I'd choose either of these setups over Kyosho, especially for the smaller pinions and higher loads in truggy.
uDi_MP7.5 is offline  
Reply With Quote
Old 08-04-2019, 09:54 AM
  #19  
Tech Adept
 
Join Date: Apr 2018
Location: from a wee town in TX
Posts: 239
Default

Oh dear. Edit, cant be botherd to explain to a brand basher

Last edited by iplaygames; 08-04-2019 at 10:15 AM.
iplaygames is offline  
Reply With Quote
Old 08-04-2019, 03:32 PM
  #20  
Tech Elite
Thread Starter
iTrader: (91)
 
1/8 IC Fan's Avatar
 
Join Date: Jan 2012
Location: North America & Europe
Posts: 4,907
Trader Rating: 91 (100%+)
Default

Originally Posted by iplaygames View Post
Oh dear. Edit, cant be botherd to explain to a brand basher
I doubt, explaining the issue at hand constitutes "Brand Bashing"!

Having run the Kyosho's from the MP7.5 - MP9 tki 3, prior to switching back to Mugen. The smaller bearings for the pinion bearing was a bit of a step back, and i did seem to replace more on the MP9's than on previous Kyosho cars, especially when the center universal got bent during a race. And even then I'd go as far as to replace the rear diff housing as well.
uDi_MP7.5 likes this.
1/8 IC Fan is offline  
Reply With Quote
Old 08-04-2019, 05:47 PM
  #21  
Tech Regular
iTrader: (1)
 
frewster's Avatar
 
Join Date: May 2014
Posts: 496
Trader Rating: 1 (100%+)
Default

How were you possibly bending center unis?
frewster is offline  
Reply With Quote
Old 08-04-2019, 08:03 PM
  #22  
Tech Adept
 
Join Date: Apr 2018
Location: from a wee town in TX
Posts: 239
Default

Lawn darting which will destroy pinion bearings in any car, i've bought 3 new tki3's over the years and all my pinion bearings have lasted ages, then again neither my boys or me lawn dart.. i've always seen bigger pinion bearing cars have issues, there is a reason for it and its also the same reason alot of brands use small bearings..
*generally* alot of times the size of the bearings have nothing to do with how long they last..
just for a giggle but true in a way - "its not about how big it is, but how well its used"
iplaygames is offline  
Reply With Quote
Old 08-04-2019, 08:35 PM
  #23  
Tech Addict
iTrader: (5)
 
Mickey_B's Avatar
 
Join Date: Jul 2012
Location: Corpus Christi, TX
Posts: 602
Trader Rating: 5 (86%+)
Default

Originally Posted by iplaygames View Post
Lawn darting which will destroy pinion bearings in any car, i've bought 3 new tki3's over the years and all my pinion bearings have lasted ages, then again neither my boys or me lawn dart.. i've always seen bigger pinion bearing cars have issues, there is a reason for it and its also the same reason alot of brands use small bearings..
*generally* alot of times the size of the bearings have nothing to do with how long they last..
just for a giggle but true in a way - "its not about how big it is, but how well its used"

Say what you will, but Sworkz uses the same 5x11x4 bearing and “my” experience is they fail pretty frequently and require more preventive maintenance periods. This become pretty evident after my first race and rebuild. Since then I have bought an Xray and are still using the original factory bearings on the case and pinion after 5 separate events. Also, These are not some fancy Ceramic bearings either. In my opinion I would say Xray uses some pretty low grade bearings compared to others I have used. Anyhow “size” does matter and I would really be watching them on the mp10t. Bearings aside, I am more amazed they were able to get the Truggy to market this quick after seeing spy shots on Facebook.
This might have something to do with them going bankrupt and getting bought out by a bank that they are needing to bring more products quicker to market.
uDi_MP7.5 likes this.
Mickey_B is offline  
Reply With Quote
Old 08-04-2019, 09:43 PM
  #24  
Tech Adept
 
Join Date: Apr 2018
Location: from a wee town in TX
Posts: 239
Default

before a major race i changed my pinion bearings on my s35-3(well whole car, with sworkz metal shielded) and they are still in the car, thats 6 months worth and that includes a wet race.. if you're using cheap "$1" bearings theyll go bad whatever car or size they are.
i always use quality bearings and they've never ever failed me, actually i lie - i once used protek bearings in the outside hub of a ST-RR and it blew apart when i got t-boned.
bet you'll be surprised that if looked after and setup properly how long those pinion bearings last.
iplaygames is offline  
Reply With Quote
Old 08-04-2019, 10:05 PM
  #25  
Tech Regular
iTrader: (3)
 
uDi_MP7.5's Avatar
 
Join Date: Jun 2003
Posts: 487
Trader Rating: 3 (100%+)
Default

Appreciate the backup, clearly plenty of others have been through the 5x11x4 bearings failing.
If you have no point of comparison then of course they will seem "OK", but in the long run with the larger bearings you can drive for much longer before servicing - in an area which takes comparatively more time to service (loctite, reshimming, etc). This thread is about the truggy and I really don't think 5x11 has a place in it, as Mickey says I'd be watching that area carefully on the MP10T. The MP9 / MP10 scrapes by but there's more mass and drivetrain load in truggy.

If you grossly undersize a bearing for an application, it doesn't matter how good it is, there's going to be a ceiling on peak load rating and given the smaller contacting parts, they will wear faster. Blaming driving just reiterates it's a weak point on the car.

I certainly don't think Xray stock bearings are great, but not a fan of Kyosho's metal shields either. Thing is, on any kit you replace them on the first rebuild anyway (or I do), and from that point the kit with the correct bearing sizes will last much longer. FWIW I've been using Mugen kit bearings (8x16) lately, seem OK. Also using Kyosho 7075 hubs/uprights and shock shafts on various cars. Zero care for brand. But I'd never own another 1/8 offroad with 5x11 bearings.
uDi_MP7.5 is offline  
Reply With Quote
Old 08-04-2019, 10:17 PM
  #26  
Tech Regular
iTrader: (3)
 
uDi_MP7.5's Avatar
 
Join Date: Jun 2003
Posts: 487
Trader Rating: 3 (100%+)
Default

Anyway, still good to see another truggy, found some higher res pics on RCdriver:







uDi_MP7.5 is offline  
Reply With Quote
Old 08-05-2019, 01:01 AM
  #27  
Tech Elite
Thread Starter
iTrader: (91)
 
1/8 IC Fan's Avatar
 
Join Date: Jan 2012
Location: North America & Europe
Posts: 4,907
Trader Rating: 91 (100%+)
Default

Originally Posted by frewster View Post
How were you possibly bending center unis?
Getting hit from behind, and hard landings. Only the rear was prone to bending.
1/8 IC Fan is offline  
Reply With Quote
Old 08-12-2019, 07:03 AM
  #28  
Tech Elite
iTrader: (14)
 
HaulinBass's Avatar
 
Join Date: Dec 2004
Location: grande prairie alberta canada
Posts: 2,624
Trader Rating: 14 (100%+)
Default

ill try one when available, my current truggy uses 5x11s on the pinion, i bought a bunch of extra pinions incase they failed but 4 gallons in they are still rocking. using the 5x11s from kyosho kits
HaulinBass is offline  
Reply With Quote
Old 08-21-2019, 09:36 AM
  #29  
Tech Prophet
iTrader: (96)
 
houston's Avatar
 
Join Date: Sep 2004
Location: Sherwood,OR
Posts: 15,829
Trader Rating: 96 (100%+)
Default

Brraaaaaap
houston is offline  
Reply With Quote
Old 08-22-2019, 06:00 AM
  #30  
Tech Master
iTrader: (4)
 
Join Date: Feb 2002
Location: Greenwood, IN
Posts: 1,013
Trader Rating: 4 (100%+)
Default

Originally Posted by HaulinBass View Post
ill try one when available, my current truggy uses 5x11s on the pinion, i bought a bunch of extra pinions incase they failed but 4 gallons in they are still rocking. using the 5x11s from kyosho kits
kyosho has the best bearings. I thought the nmb bearings Mugen sells were good then I tried the kyosho clutch bearings. The kyosho ones just go and go without getting gritty.
windellmc is offline  
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service