| Ok,the first thing to do is arm yourself with a multimeter and check the battery voltage.At rest,ie nothing on the bike switched on,you should get around 12.5-13.5v dc.Start the bike and check again,the reading should be around 14.3v dc.If the battery is not being charged,have a look at the yellow wires that come out of the alternator.The alternator is on the l/h side of the bike.Its not unusual for these cables or their connector to burn out.Also check the charging circuit fuse on the side of the battery.If all these look ok then it looks like the regulator is cooked.There are some test you can do to check it,have a look in the Haynes book.
Good Luck. | 
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