Jump to content

Fantic lower frame tubes bending


TRS Fan
 Share

Recommended Posts

Not wanting to revisit the much talked about issue of Fantic frames with cracks / movement at the steering head, as that as been covered many times previously.

The lower frame tubes under the engine are also prone to bending and in some cases flattening slightly against the underside of the engine cases - see attached images.

The two images are of two different bike circa 1984. Both have been hit from underneath, and then hammered from above to allow access to remove the casing. I believe most Fantics were fitted with a plastic sump guard originally.

Looking at images of refurbished bikes, none of them have this issue, and the engine cases are well clear of the frame tubes, as they should be. Is it a case of looking for a bike with tubes that have not been abused (probably hard to find?) or can they be repaired successfully.

I am aware of Fantic making frames with tubes within tubes for strength - does that apply only to the headstock area or the lower tubes under the engine?

If the lower tubes are 'tube within a tube' it makes cutting and re-welding more tricky - and this is an area likely to be subject to impact loads at some point.

Any thoughts or existing solutions would be welcome.

Frame 1.jpg

Frame 2.jpg

Edited by TRS Fan
additional information
Link to comment
Share on other sites

 

 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

×
  • Create New...