After Varioweights-Tausch scooter no longer pulls 🙁

Good morning you, I hope you can help me I got a Honda Lead as a gift. Since these parts are very sluggish, I changed the Vario rolls yesterday in the hope that there will be a bit more. ALso everything is torn down, weights changed, put everything back on and screwed on. Now my problem of the scooter only turns very low and brings no more power on it doesn’t even start out of the stand but doesn’t go out of the way. Power ?!?!?!?! I’m helpless what have I done wrong? I hope you can help me. Greetings Stef