hey guys i just picked up a china klx style bike with a perimeter frame, with a yx150 in it. i dont even know what brand it is, the only markings were x150 on the fork guards. so anyways i got it from a friend who bought it with a bad kick start gear. it ran fine before (needed to be pop started) but after the motor was torn all apart it have some bad crankcase pressure. it leaks oil out of both vents and even will loosen up the dipstick. but the weird thing is it DOSNT smoke a single bit! oil level is right on and vents arnt plugged. im new to these bigger motors so any help will be appreciated. thanks!