So I recently rebuilt my 2004 rm 250 completely. We out a new hot rods bottom end in it, we sent the cylinder off and had it done. We broken the bike in and the bike now has exactly 5.0 hours. Today out of no where the shifting on it completely went out of wack. It won't go passed 3rd gear, neutral is a tiny little gear and hard to find. Please if anyone can help me out with this bike and what might be the problem.