It'd the battery. Buy one of these: http://motorcyclebatteriesusa.com/battery-finder-list.asp?battery=233
Your battery needs charging. Should have @ 13.5v when it's fully charged.mudokan said:yeah battery voltage with the bike off is around 12.5V-12.8V (using an analogue multimeter) and at 5000rpms with high beams 14.0V