136KG is heavy. We were tight on payload with ours and I looked around a lot for a lightweight scooter with enough power for both of us. Eventually went for a Peugeot Speedfight 100 which is just 96KG, a whole 40KG less than the SH. It goes really well and will eventually hit 60mph and has good storage space especially with a top box on the back.
Cheers
Barry
Cheers
Barry