The battery seems to be low when I have not ran it in few day. It is hard to start and it runs the battery down to almost nothing. Then I let it sit for about 30 min. and it starts right up. Riding it around does keep it charged. Anyone?

 

So after you ride it around it recharges? Sounds like you have a voltage draw while sitting. If it charges right up after a ride its not the regulator.

 

Get a battery tender, Walmart $21 throw it on the charger every evening... I had the same issue, works fantastic.

 

Just put the meter back on it. It goes from 13.33 to 13.32 and back again (yes back and forth). Is this a very small drain?

 

Clock?

 

No clock on a 98.

 

Clock isn't enough to drain it.
Cold weather will reduce the battery's voltage - or is it amperage? Cold mornings, hard to start because of that. Let the bike sit till the air warms up, bike will start easier..

 

It has always started great in the cold. Could it be a spark plug not firing right off? It is time to replace them.