I am wandering if a 1100 (NOT Di) enigne from a ZXI or STX would be a straight swap into my STX900??? How about a 1200 from a STXR, would that be a straight swap into my STX900 (what additional parts would i need)?

Has anyone done this before?

I am looking into buying a new (refurbished or used 1100 or 1200 engine) to install into my STX900

Please, any information on this subject would help.

Thanks for your time.