[AzCal Retred]

https://www.mcnews.com.au/ducati-bialbero-gran-sport-based-125-gp-racer/

When Ducati decided to go Grand Prix racing in the mid 1950’s the 125 cc class was the obvious target.
Fabio Taglioni had already produced his first complete design for the company – the 100 cc Gran Sport, which was on its way to becoming unbeatable in its class in the long distance road races of the day.
A 125 cc version followed almost immediately and it was this that formed the basis of his 125 Bialbero (two shafts) GP design.
In fact the DOHC Bialbero was pretty much the 125 Gran Sport with a new cylinder head.
The design was first seen in February 1955 and was the precursor to the first of Taglioni’s Desmodromic racers, the 125 Trialbero (three shafts) that debuted in July ’55 (but more on that in a later column).
The 125 Bialbero was not widely raced by the factory itself but supplied to privateers who won national championships in many countries (Sweden and Brazil to name two).
A certain Mike Hailwood won many races on one in the late 1950s! The Bialbero was developed and sold up until 1959.