Start Up Problem

[longumd]

Hello friends,

I recently got a problem with starting, as per seen from the old post, I might need to check the carb thing. Anyway I would like to specify my problem and hopfully you guys might have some suggestions.

It is a 2003 GZ, 6000 miles. Got it this May and ran with no problem during the summer, except the charging voltage is a little bit low(13.2V). I charge my battery every two weeks, so it was fine. I always use choke when staring. My bike was just park outside and after series of heavy rains last month, I cannot start my bike at all. I changed the spark plug and clean the air filter last week. I got my battery fully charged last night (~12.8V). This morning when I tried to start the bike, the engine would die soon if I only press the start button for 2-3 seconds. Finally after I tried to keep pressing start button for ~5 seconds, the bike starts and runs as well. I rode it this morning for ~4 miles. Tonight when I try to start it, same problem, engine would die soon if I only press the start button for 2-3 seconds. Tried 3 times to start then the battery is drained.

Thanks in advance for all your suggestions.