Hi, I just replaced the crank on my son's kx85. I checked the gears and gear froks and tested it. it shifted ok and the gears turned fine. after I put the case together and tested it, it gets stuck in neutral. I took the clutch basket out and checked the sift shaft mechanism and everything look ok with it. it shifts 2nd to 5th and back down to neutral but then it gets stuck in neutral and won't shift up or down. if anyone knows what the issue could be please let me know.