often (almost every time), when I start my Honda CM250C there is an awful metal on metal grinding noise that I think is coming from either the crankcase or the starter motor. The engine also is not catching (ie its not running). I pulled the starter motor out and opened up the crankcase. The gears/chains do not seemed to be worn out. The starter motor brushes are not worn down. I have read that the noise could indicate that the starter motor is not getting enough juice from the electrical system/solenoid (the battery is brand-new). Can anyone verify this? Any suggestions/ideas what it could be?