Gilera Runner Purejet (2008) Kickstarter retrofit ?

First hello to everyone.Drive a Gilera Runner Purejet 50 (Bj.2008)The scooter is an injection.I want to retrofit the kick starter now for safety.Battery provides enough energy for the petrol pump but it is not enough for the start of the vehicle.In such cases the kick starter would be an alternative solution.The hole for the subsequent installation of the kick starter is already available on the Vario cover from factory. inbau infos about needed material your experiences etc. Thank you for the answers! mfg)