Maserati Motorcycles were in production from 1953 until 1960, a division of the Orsi Industrial Group which included the production of sparkplugs, batteries and other electrical items for the motor industry. Beyond that, the relationship to the car company and Trident logo until I found the following letter from an Orsi family member in an 80s Classic Motor Cycle magazine.
I read with interest your December issue, especially the answer in Helplines regarding Maserati motorcycles.
ln 1937 he bought from the Maserati brothers lhe Officine Alfieri Maserati and the Fabbrica Candele Maserati and transferred both activities to Modena in 1939, by agreement with the Maseratis, who gave their technical collaboration until 1947.
During the war the production of the Officine Alfieri Maserati was converted to small trucks and three wheelers with petrol and electric engines and to tooling machines.
manufacturers were not connected.
For anyone interested in more detail, an extensive article about Maserati motorcycle production appeared in the ltalian magazine Moto Tecnica in March 1989.