Hey, can someone please help ? I was wondering if any other bike engines are compatible with a 1990 FZR1000 ? other brands or other Yamahas ? thanks.

I've heard the FZR1000 engine uses the same mounts as the FZR 750 and Fazer 700 which both have 6 speed transmissions. Not sure if the newer YFZ's are the same 5 valve Genesis engine or not. I've also read somewhere that you could take the FZR750 engine and use the FZR1000 cylinders and piston giving you a screaming 900 or so cc engine with the 6 speed, but not sure about all the little details/parts that are involved with that.