hi, Im completely unfamiliar with this bike and im tryin to replace the front chain and sprockets (from pto to inner sprocket on jack shaft) I ordered the 12 and 14 tooth sprockets from dennis kirk with a 520 chain and though the 14 tooth sprocket works the 12 slides over the splines just fine but the origional sprocket clip holes dont line up with the holes on the sprocket, also when comparing chains the inner chain was definatley not a 520. anyone got any advice on this?