600 to 1000cc engine swap ??

[Fazerider]

A few years ago someone on here (Deefer?) did report that the 1000cc motor can be shoehorned into the 600 frame. Can’t recall the details, but since I find swapping the standard motor hard enough I was amazed that it is possible to ft the bigger lump in there.
As to whether it’s a good idea… sure, if you want an engineering project. Otherwise, no.