Hey guys, Picked up a KX250 for $550 from some druggies out here in eastern KY. They claimed it only needed a coil and it would run perfectly... I gave this statement absolutely no credability but the bike looked solid for the money. Its missing chain and spockets, has the wrong shifter, no spark plug, etc but the bearing seems tight with the exception of rear wheel bearings, fork seals are good, suspension seems fine, engine was not siezed had decent compression (though not great) and transmission shifted though all gears. Plan is to get the right parts on it, give it a top and, new coolant, trans oil, etc and run the wheels off it. Started taking it apart as soon as I got it home... First thing I noticed was the carb was foul... I'm talking so gummed up I had trouble getting to need valve OUT of its seat. Got that all cleaned up and then onto the "bad coil"... Both resistance and bench top power supply test showed the coil as ok. Produces a nice strong blue spark and resistance is .5 ohm on the primary and 8K on the secondary. So much for THAT. Pulled the top and off and was pleased to find no major damage... Cylinder was sleeved but no big deal. Piston was a bit worn (not nice and tight in the cylinder) but I was replacing it anyway... Started measuring to make sure it was stock size. Piston measured 68.2mm at the thrust surface... &%$#@!? Stock size it supposed to be 66.something... Even .060 overbore was like 67.something... Entering the part number showed it was a piston for a 265 big bore kit... Sweet! Only issue is the vin checks out to a 92 and the part number is showing 93-00 year compatibility. I am going to assume they've swapped engines or parts of engines at some point. Now for the bad news: The big end rod bearing does not move freely... Its not out of spec for clearance... In fact it has no play at all. I THINK its bad... The condition of the carb suggests it may have sat for a few years (that or than fueled it with gello instead of premix for awhile) and its a bit dry... I am HOPING that its just a little stuck or something so I put a bit of 2 stroke oil on it and work it in a bit and am letting it sit... If it moves freely after this should I run it or not chance it and fix it? If the answer is fix it I am thinking I will buy a new crank assembly (found a used one on fleabay which looks nice and claims no up down play for $138 BIN) and do the work myself... This the best route? How hard is splitting the case on the (probably) 93 KX250? What tools will I need? Finally where is the best place to find parts for the 265 kit? I need a piston and rings obviously but I assume the gasket set will be different as well? Thanks.