roller does not start with kickstarter

It is a China scooter Nova Motors 125ccm. The scooter starts immediately and completely unproblematic by electric starter and runs perfectly. My problem is that I can’t get a start via the kickstarter (even after feeling 100 times) . This condition is incomprehensible to me, if the electric start does not work problematically, nevertheless the starting by kickstarter must also work. Important prerequisites like petrol supply / spark are then Perhaps someone (possibly from experience) can explain this circumstance and give advice. M. f. Gruss Karl Voss