Re: Hi from down under
Less than 1/3 of a horse. The Honda People friction driver was imported into NZ, (only 4 of them) and that sounds about right, they struggled to move under their own steam on the flat. There's a link on the Icencicam page somewhere.
I had never thought about restricting an engine before I came in here, and I thought I was struggling, but your regs take you into a different league.
I have an idea. Horrible engineering, but what about a spring loaded tensioner and micro switch on the top run of the chain? As power/torque rises, the arm moves and cuts the sparks.