Yes leggy, the engine is Much older,
I think wartburg or saab used it at some point,
I wasn't aware that norton had, although SUZUKI ,I think it was made a prototype,
But i dont think it went into production as it was completely uncontrollable,
as for moving parts ie bearings, you could split hairs forever, and say what about the spark, that jumps from one part of the plug tip to another,And the actuall combustion itself which occurs in excess of 16,000 times per minute.