The first 'Tourist Trophy Race for the Championship of the Commonwealth' for motorcycles was held over three laps of a 33 mile course that ran from Yarra to Breadalbane and Collector. This event was held during the Easter of 1914. The same route was also used in 1915 and 1919.

The circuit followed the Federal and Hume highways (as they were at the time) for much of the route, which nowadays makes for a pretty boring ride. However the back road from Breadalbane to Collector is a little more interesting.

I'd expect that even keeping to the speed limit you'd do a far faster time than the original laps in 1914.