So I rode my bike to work not knowing it was going to rain. My bike was left outside while it poured for 6hrs straight. anyway, the previous owner (I had the bike maybe a month) put on a cheap gas cap so water got in (so I believe). I get off work and its still raining, and my bike will not start. I try to crank it over many times and end up killing the battery. I push the bike home and I drain the gas tank, next I remove the carb and took it apart and cleaned it extremely well. cleaned the jets etc. I got new spark plugs and cleaned the air filter. went to start it but nothing. I have gone through everything I can think of and the bike will not fire. It cranks, cranks, cranks but nothing. it will sometimes sputter but never fully fires. If i turn the throttle all the way open then it start but the second i let go it dies. Any ideas?