your battery might be tapped- my roommates would charge but it didn’t have enough ump to turn the bike over… replaced the battery and voila no issues starting. Speaking of which I gotta go crank her’s today before we get plastered with snow.
psat that make sure your choke is adjusted properly…
and carbs get gummed up especially if you have a fuel issue.
past that- I got nothing 
I just remember those are the issues we covered with her bike. Good luck!
