Is 89 kx250 motor interchangable to 92 kx250??

[rc51tokx250]

i have the 89 running n everything n the donor i bought last nite which is a 92 not running(bad rod bearing but complete bike) i notice they different frame different swingarm i jst wanna make sure i do this right :)thanks in advice

also if anyone has a manual for 89 n 92 kx i would love to dl one ty