Hey I'm in the same boat as this guy I think. My bike gave me the JY 1.3.2 code one day and didn't start after charging it to full. So I replaced the battery with a new one, charged it full, fastened it down, and the bike started right up. 3 weeks, 40-50 miles later, I'm getting the same error...
Was wondering if you figured out what was goin on. I have the same year bike and problem but only in second gear. Weird idle as well bouncing between 2-3k.