Last time I rode my bike was sometime last month. Tried to take out yesterday night and couldn't get the push start going. Cranks up but won't turn over. Dash lights and blinkers work so I assume battery is fine. Since it has been very humid/hot I suspect moisture may have gotten in fuel. Also something I noticed was that if I don't use a hill to get lots of speed I can't hear the bike crank at all when push starting. Any thoughts?