Okay, so now I just had a problem with my battery! It just died not even a mile from my house!! So again I just got a 1992 and I am trying to figure this thing out. It is cold here in Montana right now so I let it warm up a little bit (maybe 5 min.) and then I have to let it idle down my dirt road for a ways. Well I did not even get to the pavement and it totally died. My guess is that it will not charge the batt. unless you have some RPMs. So my question is at what RPM does it charge and how long should it run on the battery alone before you get in trouble?