fourtrax 300 wont charge

[bf750superduty]

i have a 2000 fourtrax 300 that stopped charging this weekend. It stats up and runs fine if u kick it but it wont charge the battery and when you turn the lights on they are really dim and dont get any brighter when u rev it. i think the battery is good cause it is about a month old and it was working fine just slowly got weaker throughout the weekend. do you think its the stator or could it be something else?