I have an 07 foreman s with 500 miles 100 hrs the motor seems to make knocking noise at idle and hear at slow speeds. motor runs really good i have changed oil in front diff, engine oil just changed. 4x4 works fine but bike doesnt have to be moving to hear it. it knocks in neutral at idle no problems other than noise. all stock no mods what so ever. any ideas? i dont think is rod bearing but dont know how to check without splitting cases.