Vincent in the late 30s had a sort of mono-shock (duo-shock) , but 2 shock rear suspension.. and could do at least 120+ mph.
Rollie Free helped put it (and riding near nekkid
) on the map in the 50s.. running 149 or 150 on the Great White Dyno..
It was a bike many riders would lust after, and wish they could own for a very long time... trumped only by owning a Brough Superior..
Pretty sought after, and pricey ride.. these days..
Maybe someone will post a pic of Rollie Free on his epic ride...