That brings back memories, Stationary. When I was at school I put a Tor the same as that one on my bicycle, driving the front tyre with a wooden roller. The engine hung head-downward. Declutching involved a handbrake-type lever and Bowden cable that pivoted the engine upward so the roller didn't touch. Of course it was necessary to pedal a bit from a standing start to reach a speed where the motor could be used. I won't say they were the good old days - if the road was wet I got a faceful of spray from the roller.
