2011 YZ450 breaking subframes



18 replies to this topic
  • nedted

Posted September 02, 2013 - 10:46 AM

#1

I've broke two subframes on my 2011 yz450 within 20-30 hours of each other, and they both broke in the same place (in between the exhaust mount holes where the fender bolts on) and I was wondering if anyone else has had this problem and how to fix it. Below are some pictures of the subframe.
ImageUploadedByThumper Talk1378146536.185157.jpg mImageUploadedByThumper Talk1378146772.200881.jpg
ImageUploadedByThumper Talk1378147534.098337.jpg



  • phiderman

Posted September 02, 2013 - 11:15 AM

#2

I cut the end off and made a new price out of steel and then riveted it into place. No problems since.

  • phiderman

Posted September 02, 2013 - 11:17 AM

#3

Here is a picture

Attached Thumbnails

  • image.jpg


  • cattledog924

Posted September 02, 2013 - 11:52 AM

#4

I have broken the subframe on my 2010 multiple times, twice in that same spot. I found a good welder, which is cheaper than a new frame. It has really pissed me off.

  • nedted

Posted September 02, 2013 - 01:05 PM

#5

I cut the end off and made a new price out of steel and then riveted it into place. No problems since.

Thanks. I'm gonna try to fix it like this. I'll post some pics when I'm done.

  • nedted

Posted September 02, 2013 - 01:06 PM

#6

I have broken the subframe on my 2010 multiple times, twice in that same spot. I found a good welder, which is cheaper than a new frame. It has really pissed me off.

The first time I broke my subframe I brought it to a welder and they welded it for $20 but it only lasted one ride before it broke again.

  • kxboi704

Posted September 02, 2013 - 01:09 PM

#7

quit casing jumps bud



  • cattledog924

Posted September 02, 2013 - 01:37 PM

#8

1378157860279.jpg

  • DC_Excitement

Posted September 02, 2013 - 03:44 PM

#9

are they breaking with stock or aftermarket exhaust?



Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • nedted

Posted September 02, 2013 - 04:50 PM

#10

are they breaking with stock or aftermarket exhaust?

I have a yoshimura full system on my bike.

  • nedted

Posted September 03, 2013 - 07:09 PM

#11

ImageUploadedByThumper Talk1378264129.680526.jpg
ImageUploadedByThumper Talk1378264146.677015.jpg

  • Norton218

Posted September 04, 2013 - 05:40 PM

#12

my 12' broke in the same place to.all so with a yosh slip on system.I now one guy that has a Dr.D system on his 12' and he has had no problems



  • DC_Excitement

Posted September 05, 2013 - 04:13 PM

#13

I asked the question because it may be an aftermarket exhaust issue more than a Yamaha problem. I have the stock exhaust and hammer on the bike with a lot of bottom outs and its just fine.

 

maybe there is too much weight on that one mount?



  • asnyder2

Posted September 05, 2013 - 04:51 PM

#14

Hope that its not related to having yoshi exhaust...I just got one recently

  • Aflo16

Posted April 04, 2016 - 05:24 AM

#15

I just did this with my '11.  broke the subframe in the exact same spot.  I have previously had rub marks on my exhaust (FMF F4.1) so I know I was impinging.  When I finally had failure, it was a first ride on a new rear tire.  I had switched from a Pirelli Scorpion 120 rear to a Maxxiss Maxxcross IT 120 rear.  Did any of you have rubbing?  What tire/exhaust combo did you run?  Thanks.



  • cpetz24

Posted April 04, 2016 - 06:49 AM

#16

Checking mine tonight.  I've got the stock exhaust though.  Common theme from above is that everyone has had an aftermarket exhaust.  Yoshi mainly.  Coincidental?  Maybe, but seems fishy. 



  • F0Xryder61

Posted April 04, 2016 - 08:02 AM

#17

50+ hours on mine with a full fmf 4.1 (i think) on mine. No problems so far...

  • Aflo16

Posted April 05, 2016 - 06:12 AM

#18

I bit the bullet and bought a new subframe (albeit aftermarket).  I just finished undrowning my brother in law's quad so my bike is next up for reparis.  Going to take the subframe off and pop the new one on.  Then I think I'm going to spin up a spacer on my lathe to hold the exhaust a bit further out.  I haven't looked at it in detail yet so I am not even sure if there is room to space the exhaust out further but if there is... I'm going to have a new subframe and a newly made part that might solve this problem once and for all.  And for anyone that has not yet blew their frame off the back of their bike with their rear tire... it might be worth taking the extra step in preventative maintenence to rig up a space.  If sucessful - I'll post a pic or two.

 

Thanks for the info guys...and I agree - seems to be related to aftermarket pipes.  Still not going back to stock tho.... :thumbsup:



  • mikedabike

Posted April 05, 2016 - 11:25 AM

#19

I know yosh revised thr mounting on thier pipes sometime after the 10 came out.





Related Content

Forums
Photo

YZ450F 03 Sparks driving me crazy by SirAttard


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
Forums
Photo

100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.