Hey guys, just recently picked up a 91 kdx 250 and it turned out to be pretty beat. Bought it in Non running condition, cylinder was toast with a 1/4 deep scrape on the intake side all the way up. Seems as if the bottom ring bumped out at high rpm and jumped up on top of the ring positioning pin. The cylinder was in terrible need of replacement, the piston skirts were curved in from skirt slap. I can only imagine the racket that it made when it was running. Anyhow, tore it down completely and cleaned out the gobs of metal filings from the bottom end, noticed also the large amount of crank walk which in turn ate out the big end on the connecting rod. After diagnosing everything and adding up the cost I branched out and began a parts list. And am pretty much at a stand still with the cylinder, I know I do not want to send it out to get re-coated and have been leaning towards a wiseco sleeve. Found a used cylinder on ebay from a 1990 kx 250, it seems to be similar to the kdx 91 cylinder. It's already been sleeved and needs a piston. My question is WILL IT FIT on the kdx cases and have the same stroke. I've tried looking for a used Kdx cylinder but the do not seem to exist. It's either buy this used kx 250 cylinder or a wiseco sleeve. Figured I'd run it by you guys for good measure. Thanks for any answers.