How do i get my motorcycle to hold a charge? My motorcycle has trouble starting please help.?

Right now I can start my motorcycle. I can turn the key, turn the kill switch on and press the starter. The problem I having occurs after serveral days of non-use (like 1-3). It won't start or it will lag instarting...meaning that I have to hold the starter on longer to make sure it stays going. yesterday I I rode my bike for over 200 miles. About 100 miles in I couldn't start it after being stopped for 2 hours. Someone helpped push start it, that worked. Then I get stranded on the high way because it dies at stall. I couldn't even get the lights to turn on after turning key or the spedometer. also the trip meter keeps on reseting to 0 without me reseting it. How do I check for my problem? There is a brand new battery in there about a month old. Someone told me my STATOR COIL could be bad and I can check it by opening up and smelling it, if it smells burnned that's most likely my problem. another possiblity it could be my rectifier that needs to be replaced. Which one do you think it is? is there a test I can run to check if the system is charging right? please help.