R1Guy, switches are not important. They already from something else, not 1100's.
MeanBean49, thanks. I have nice new brake discs for 1100 and for matching with rear wheel want to keep front also.
homer, if it is only wheel axle size ... i will be very pleased.
Main worries are for height between triples and center column and bearings ... where it fits with the frame.
Currently I don't have any sizes, and going to order busa front end from US to Europe. So it will be late if I get it and understand that it is not easy fit.