1988 yz 250 motor in 1987 yz 250?

[schmanman]

I know they use diffenent pipes, but I am not sure on motor fittment. does anyone know it it will fit?

thanks!

-Alex

 

[jsantapau]

did you try comparing part #s between the 87 and 88 engine cases? if they are the same the bottom end will bolt right in