Been having issues with my 09 zx10. Its died on me a couple times, wont start at times unless pop started. I've charged the battery for a couple hours and it ran fine. Stopped, shut engine off, it started but had to try a little harder than normal. Shut it off again 20 minutes later and it wouldnt start. My previous thread everyone said the rectifier is bad. Right now after the ride my battery is showing around 11 volts both when the bike is off and running. I've got it hooked to the charger to see if that changes any later. Shouldnt it be closer to 15? So now I'm wondering if its the battery or rectifier that is bad.