OK so i have been riding my whole life and am looking to move up to a 2001 YZ250. I found a bike on craiglist and the guy is offering to trade me his 01 yz250 for my 03yz85 because he wants to get his son a bike. Only catch is that the bike does not run because it needs crankcase bearings. This worries me a little because I know with crankcase problems can come alot more than just bearings. I dont want to trade, pull it all apart and find i have a blown piston or cracked block... Has anyone ever changed crankcase bearings on a 250? Is it a common thing to go on these specific bikes? Do other problems come along with bad bearings? All info is much appreciated! Not trying to screw myself over and end up in a money pit I cant crawl out of... Thanks!