The last time out I used the kick starter on my 2005 crf450x because the battery was dead. After a couple of kicks it kicked back, so I gave it a couple more kicks and it started. After that point it has made a noise that sounds like a spring on a starter dragging. The noise will go away after a while, or if I hold in on the kick starter it goes away immediately. The bike runs and shifts just like it always has and doesn't seem to be affected by the new sound. Any ideas what is causing the noise?