I just got the bike last week, changed oil/filter and air filter everything was good. Took the bike out today to a pit where the sand is pretty fine. Ran perfect all day (2-3hrs) then last ride of the day the bike just shut off. Kickstart wouldnt move, I kicked very hard and it went all the way down but sounded like a knocking the motor so i never tried again. I was driving the bike a little hard, and also jumping it. Just read then on another thread that the breather hose is in a bad place. Any suggestions on what is wrong with the bike and what steps i should take, im going out now to look at my oil filter to check for metal particles. I will probably take as much as the motor apart if i need too and hopefully not have to bring it to a mechanic. PLEASE HELP! Any suggestions ?