Hey EQ23,,, I am a newbie here as well, but have been involved with all kinds of swaps in cars, trucks, go kart buggies, and bikes. Right now, I am considering putting a Yammie 750 triple in a Kawasaki Mule that had a little 286 in it. It's my experience that you can do pretty much what you WANT, KNOW and CAN AFFORD to do with all things mechanical. You need to have a cutting torch, a good grinder, a good mig welder and know how to read wiring diagrams,,,,and know how to use all of the above.
When you start thinking about an engine swap,,,you need to consider the electronics that the new engine will require to run. Most generally, The electronics are specific to the engine AND the wiring harness. I other words, the CDI's are not all interchangable mostly due to the wiring connections etc,etc. Same for the charging systems etc,etc.
Not trying to scare you off Guy, but you need to be aware that all is not just changing engines. When you go from a 750 to a 1100, I'd almost bet the CDI's will be different and prolly the connections as well. BUT,,,,BUT all is not lost,,,,,,
You can get your cutting torch,grinders, and welder and shoehorn that 1100 in your frame,,,then transfer the entire wiring harness and all the components from the donor bike,,and,,,,,,,,start riding like you wanted to.