If it won't idle, it's your pilot and air screw. Did you put in the 27.5 pilot or leave in the 25? If you left the 25 in, set your air screw at 2 turns out. Move your air screw in 1/2 turn at a time. If it starts to idle better when you turn the screw in you need to put the 27.5 pilot jet in. If you over oiled your filter, that will cause it to run shitty also.