Ducati Sporting Club
Home Calendar Gallery Membership Online Shop DSC Blogs Extras
Go Back   Ducati Sporting Club > Model Specific - Discussion, Technical Problems and Help > 999 / 749
Reload this Page mono subframes ? made of cheese
Forum Home Register FAQ Search Forum Recent Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 13-Aug-2006, 10:27 PM
posiden posiden is offline
Registered Forum User
Montjuic
 
Posts: 65
Join Date: Jun 2005
mono sub assembly

Wave, looks like where its broken is caused by the weight of the exhaust as your weight is applied to the sub frame at the other side of that weld. The exhaust is bolted onto the subframe with one very big bolt at the back and two smaller bolts closer to your bum.
It was a common fault on 03/04 bikes that the alloy around the big bolt would snap at the weld to the subframe.My mate nearly crashed his 03 749S when the exhaust fell onto his rear tyre at high speed. Ducati did a superb repair under warranty.
How olds the bike can you get it sorted under warranty?
If your getting it welded I would get some extra strengthening added as some alloys become soft as cheese when theyve been welded up.
Reply With Quote
  #12  
Old 13-Aug-2006, 10:44 PM
Gizmo Gizmo is offline
Registered Forum User
Big Twin
 
Posts: 1,550
Join Date: Mar 2005
Mood: is it the weekend yet??
As Pete points out the seat load is supported in front of the crack so its weight from behind, adding a set of panniers at 10 - 20 kg would load it quite a lot. From the ones i've seen its not just load related, its a flexed stress area and it looks like crack comes from the end of the weld, thats a fairly common one on mountain bike frames so we try and avoid welds ending like that. alloy tubing is thin, 1.2mm - 2mm being the norm.
Reply With Quote
  #13  
Old 16-Aug-2006, 05:03 PM
Wave's Avatar
Wave Wave is offline
Registered Forum User
Mille
 
Posts: 146
Join Date: Apr 2006
Okay basically i wrote a big letter to ducati saying even though my bike is out of warrenty its unacceptable for the subframe to snap on a 2 year old bike etc etc

They got intouch with ProTwins in godstone who currently have the subframe, they told me today the subframe cannot be fixed and ducati are going to pay for a new one.

Good news
Reply With Quote
  #14  
Old 09-Jul-2012, 09:57 PM
mileypau's Avatar
mileypau mileypau is offline
Registered Forum User
Bikes: Ducati 999s, Kawasaki ZX7r, Kawasaki KX250
 
Posts: 36
Join Date: Feb 2012
Quote:
Originally Posted by Wave
Okay basically i wrote a big letter to ducati saying even though my bike is out of warrenty its unacceptable for the subframe to snap on a 2 year old bike etc etc

They got intouch with ProTwins in godstone who currently have the subframe, they told me today the subframe cannot be fixed and ducati are going to pay for a new one.

Good news


Old thread...old problem....I got it.

2005 sub frame snapped both sides - never had panniers or extra load. Snapped behind where I sit. Noticed at track day today as exhaust moving around.Other 999s 749r owners put me in rigth direction.....let's see what Ducati say when I get in touch. 7 yr old bike !!
Reply With Quote
  #15  
Old 10-Jul-2012, 05:40 PM
gsxr7111000 gsxr7111000 is offline
Registered Forum User
 
Posts: 9
Join Date: Dec 2011
I snapped 2 in the last 3 years.
Ducati wont do anything anymore.

I had 4 new ones in stock, But sold them to a ducati breaker, If you want his number PM me.

Its the exhuast that splits them. I machined some larger rubber mounts for the sub frame, Problem sorted
Reply With Quote
  #16  
Old 08-Mar-2013, 01:44 PM
barneychubble barneychubble is offline
Registered Forum User
 
Posts: 12
Join Date: Apr 2012
I had exactly the same issue, managed to get ducati to change it out of good will........
Reply With Quote
  #17  
Old 03-Apr-2013, 01:34 PM
mileypau's Avatar
mileypau mileypau is offline
Registered Forum User
Bikes: Ducati 999s, Kawasaki ZX7r, Kawasaki KX250
 
Posts: 36
Join Date: Feb 2012
Sub frames

Quote:
Originally Posted by barneychubble
I had exactly the same issue, managed to get ducati to change it out of good will........

Was that recently?

I didnt get any joy....bought one from the USA. Better design of bracing. Also set up the exhaust so it isnt 'hanging' off the frame. So far no more breaks. But i do have the bits of the old one...wouldnt mind getting it replaced as back up.

Who / where did you write to?

ta
Reply With Quote
Reply
  
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Postbit Selector
Switch to Vertical postbit Use Vertical Postbit

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Recent Posts - Contact Us - DSC Home - Archive - Top
Powered by vBulletin 3.5.4 - Copyright © 2000 - 2018, Jelsoft Enterprises Ltd. - © Ducati Sporting Club - All times are GMT +1. The time now is 09:05 PM.