Not starting

[Cobourg Monster]

My 05 620 Monster wouldn't start this morning. The battery didn't have enough power to turn the engine over. I had the same problem when i bought the bike and a new battery solved the problem. I've tested it and it seems to be charging and I've ridin every day this week except today so it not from sitting. Anyone else have any problems like this. Thanks for your help.

[MonsterHooligan]

maybe check that the battery connections are clean and really tight?
also a battery tender for around $30 is pretty cheap insurance...

[Cobourg Monster]

Tried charging the battery and got good voltage with volt meter around 12.5. Tried to start it and nothing, the voltage dropped to 10.5 after that. Does anyone know whats causing the voltage to drop or whats draining my battery. I had this problem when I first bought the bike in May. A new Yuasa battery fixed it and no problems until now.