I got and 03 from guy its had been rebuilt recently his son left seat off and air box top off motor got full of water I guess water froze and push seal out on the clutch side so I replaced it it did fine for a few rides but all of them was no more 5 to 10 minutes ride I took it friends to it did find of about and hour then got smoke bad I mix my fuel so it not a oiler problem i told crankcase was seal with yamabond only when it was rebuilt. What should I be looking to do besides leak down test will do that soon