Hello . was wondering if i could get some pointers here. I recently purchased an 03 Kfx 80 [ not running ] for my son in hopes of getting it running but so far no luck. Here is what I have done at this point. Carb has been cleaned, new rings have been installed, new petcock, flushed out exhaust pipe. Now to the problems... The bike starts after a lot of turning over but, then once running it only goes a few mph and constantly bogs down. Once or twice it has hit the power band then back to bogging. It is getting spark as well, one more thing , its also leaking oil while running to the point its seeps out of all the plastic duct shroud that wraps around the head and out of drain hole on the bottom of that shroud. So here we go, loss of power and hard starting followed by a leak. Any help would be greeeeeaaaatly appeciated lt1