Replace your spark plug at least every 2500 kilometers and always install one from NGK so your machine will always run like clockwork.
This is the same spark plug that Piaggo/Vespa installs as standard in the Piaggio MP3 HPE from year of manufacture 2019, and the Vespa GTS 300 HPE also from year of manufacture 2019.
Original products at imitation prices, at Roger Trading it can be done!