Battery won,t stay charged

There are several reasons why your batery does not charge at all:
1. Check in the magneto if the coil is burned.
2. Check the Rectifier Diode might be shorted or
opened.
3. Check your batery if it is still good.Sometimes we think that the problem is not in the charger ,but the baterry itself is too weak.
4. Check the fuse if it might be opened.
5. Check the batery line( Standard color of Red) if it is loosen or accedentally cut..