Suzuki lt 250s performance parts

I got a 86 lt250r Not sure what the difference is from 86 to 90 but im sure the s has something to do with it. If the parts are the same let me know I have some things like FMF pipe and more. I have a whole machine id like to get off of, Just needs new rings but I dont like suzuki and got this on trade.
 
The frames, seats, suspensions and all that are pretty much the same but the 250r motors are 2 strokes and the 250s is a 4 stroke. I have to do a little more research but I think you can drop the 250r motor in the 250s frames with minor modifications. If you were closer to me I would definitely be interested in checkin out your 250r if the price was right !