what year engines will swap on ex500
 

Last week i bought a 1992 ex500 parts bike w/9xxx miles and no title off a buddy of mine for 100 bucks. An hour of tinkering and i got it to fire right up. 2 nights later its running like a top. There's several ex500's on Craigslist for 600 or less all with titles some even running years ranging from 1990 to 2000's from as close as 20min away to 4hrs so what i need to know is what years will my engine bolt right into with no mods needed. Been without a bike all summer and i need to ride asap so any help would be awesome......Also everything on my bike works, throttle gauges etc, complete swap