Re: Subframe brackets
Posted: Tue Jan 01, 2019 12:02 pm
Got to admit Chris the more I read about it I am worried about any welded repair
The UK-based forum for BMW's sportiest Boxer motorcycles
Uk requirements re framing, ie taking a salvage frame with a different id to original will be highlighted at MOT unless it has been re registered with new details then the bike loses its age identity by going on a Q pre fix plate, For example everyone knows it is a bitsa. If it is a hack and of no value , who cares, if it has provenance and is of some value then new frame from manufacturer with same id as original. That is the law in UK. Second hand frames are not really worth what advertisers ask for them they are in fact scrap value only. This law is to help prevent bike theft and other re build issues re safety and conformity ( I guess) MOT do a leaflet on reframing vehicles and what the requirements are.. My view is those top casting lugs for the sub frame attachment are not fit for purpose and BMW are culpable. You have a very rigid cast C frame and a very flexible tubular sub frame carrying zorst rider, pillion and luggage. Not good, they have not done the structural mechanical calcs properly. Those lugs are overloaded when above normal torsional, bending and shear moments occur. They may have got the factor of safety guess wrong.Hay Ewe^ wrote:I would be carefull with an insurance claim
they are unemotional and ruthless and may jsut write off the machine,
OR it may get classified in such a way that its hard to put on the road.
I dont know that the legalities are about swapping frames
The alternate is to buy another 1100S of any kind and transfer everything over - but then the VIN wouldnt match what it was actually built as, but the components are an S-bike.
Works that way with Helicopters (yes, I made that very simple and basic)
seek proper guidance for clarification