Author Topic: Cracked S6/T6 Crankcases. Common Problem?  (Read 353 times)

0 Members and 1 Guest are viewing this topic.

Offline PaulW

  • Member
  • *
  • Join Date: Mar 2019
  • Posts: 14
  • Location: UK
Cracked S6/T6 Crankcases. Common Problem?
« on: 14 May 2019 at 05:54 »
OK, so two of our bikes have cracked crankcases, in exactly the same position.  One has been repaired, the other has not.  Is this a common problem / weakness?
« Last Edit: 16 Jul 2019 at 07:10 by PaulW »

Offline Doug

  • Global Moderator
  • ****
  • Join Date: Mar 2004
  • Posts: 3545
  • Location: Pennsylvania, USA
Re: Cracked S6/T6 Crankcases. Common Problem?
« Reply #1 on: 14 May 2019 at 21:05 »
I don't recall others reporting a fracture there (or seeing same before), though two with the same issue does suggest a trend. If it is holding fast, perhaps not wake a sleeping dog. Douglas aluminum can be truly awful to weld due to porosity and impurities. You will have to re-skim all the joints to true it up, and sleeve and bore the bearing journal round as that amount of welding is sure to distort it. Not a minor undertaking!

-Doug