If the bike isn't charging correctly, how many miles?

[mrlmd1]

The batteries are sealed I believe for safety, to avoid an acid spill if tipped over or in an accident. Only one of the reasons, the other is new technology.

What you said about the charging system is probably true, What I meant, was to hook a voltage meter to the battery terminals, measure the voltage, (it should be at least 12.8V), start the bike, you will see a voltage drop to maybe 10-11V on the meter as the starter turns over, then if you run the bike right then and there, there should be a 14V output to recharge up what was just used up, If you were out riding for a 1/2 hour, it would probably be reading less, like a trickle charge, just replacing that which is needed to keep the bike running.