Well before you tare everything apart. turn bike on side and upside down let everything run out. If the bike was laying down on side float bowl stuck open, it could fill crank up. crank seal check. drain trans oil. leave drain plug out. take diesal and fill crank up to the top. leave over night. if you come back next morning and its still full of diesal crank seals are probably good. these guys sure like to tare bikes apart without checking anything. Buy the way ive got 9 kx 500's and ive seen some s**t. check before you tare apart. 2 stroke motors are double tough. Its takes alot to kill them. Bottom ends on 5's are really tough. If your not rich, do research before you tare the bottom end apart. Buy the way above method (diesal) is a really good way to check case breakage, if you loose a piston and it comes apart, If the case will hold a liquid its ok. or you can tare the hole trans apart like these guys. When you have 9 k5's you check s**t before you start ripping things apart. It will save you alot of money to.