Hey guys im new to dirtbikes...i just bought a 2000 RM250 saturday for $1200,i drove it and it went through the gears fine the 5-6 times that i went through them all.I get the bike home and i went trail riding yesterday,and the bike wouldnt shift from 2nd to 3rd,then,it wouldnt leave 2nd into first,and then it wouldnt shift at all when i got it into neutral.I took out the drain plug and i saw one small chunk of metal,and it appears to me to be a tooth.No matter if i move the wheel or hold in the clutch,i can only go from neutral to 2nd,and from 2nd to third,but as soon as i move the wheel,it pops back to 2nd,cant get to any of the other gears.Any help would be appreciated.