['81 xs400 - '81 xs650 engine swap]

Well thanks everyone, i guess ill just use the original engine in my restoration.

['81 xs400 - '81 xs650 engine swap]

how drastic of frame mods?...the engine is super clean and $290 on craigslist.

thanks

['81 xs400 - '81 xs650 engine swap]

Hi, i have an '81 xs400h and found a nice xs650 engine on craigslist. is this swap possible, or would it require a lot of modification?