I have a '96 580 EFI Mountain Cat that is giving me problems this year. I replaced the battery last week and the machine runs for about 5 minutes (max) and revs up them dies. I try to start it again and it just clicks real fast. It appears the battery is being drawn down somehow. I charge up the new battery and it runs good for 3-4 minutes - revs up - and dies. These don't have alternators do they? Any ideas?