I change the oil about a month ago. Three days ago the bike Wouldnt shift, then my dad came home and we messed with the clutch arm adjustment until it ran normal. The next day it wouldnt start no matter how i adjusted the arm. Yesterday i got on the bike and it worked without any adjustment. It did the same thing today, as soon as I shift to first it dies. It starts up fine, Everything on the outside of the bike works, I tried putting the bike in fisrt and while it was off, id hold the clutch and the tire wouuld spin just the same as when i let of the clutch, i tried this after the slightest adjustment until i ran out of adjustment. IM hoping it is something simple, but i doubt it