Figured I'd ask, as I don't know anything about later models. Is the later model engine architecture the same as the 1986? Can the motors be swapped? (Actually, All I am looking for is if the exhuast is swappable). As it would make for a easier 4-1 project. Shot in the dark...but what the hell. One never knows until asking
After gen2, engines have mostly different mounting points and interferences, no easy switch imo. not sayin it's impossible, jjust complicated.
Someone tried to put a '93 engine into an '87 750 bike i re-bought in 2017, same bike i had previously owned and sold in 1994 to a very interesting USAF reserve pilot flyer guy. http://vfrworld.com/threads/what-do-i-have-here.54566/