motor swap??

[hauser2169]

k everyone i have an 04 kx250f. the motor blows. nothin but problems. can i put a maybe 05 or 06 kxf motor in it.. what would be the issues? also would a 450 motor fit? thats what i would like to do..
thanks for your help

 

[Backslayer]

I don't know if its a bolt and go operation but anythings possible, take a look at some of AJ's work, the guys amazing