after i ride for a while and stop the bike, it does not want to restart, i have to wait 20 minutes or more, then it will start. it will turn over normal and get gas, but no spark. during this period of non-start it turns over perfect. it has a new fully charged battery. the bike runs beautiul, it's just the re-start that i can't figure out.

 

it helps if you list the scooter and year.