Hi i am new to this so please help me, i just recently bought a Yamaha 650 v star, on my way home from driving it bout 2hrs the bike went completely dead i had to jump start it just to get it home, i bought a charger and let it fully charge overnight, the charge only lasted 2 days, i just recently purchased a new battery and with a new battery it will only run about 3-4 days and then theres not enough juice to turn it over, i have checked the voltage reading while running and revved a bit, it reads anywhere from 13-14, is this normal for a bike to have to charge it every few days or do i need to look at other options here, i do have another older honda 400 and have never had to even put it on a charger yet, can someone please help