The entire History and Development of motorcycle Valvetrains ! 

the valve system was designed by Salamaggi he worked for Parilla , Lambretta Gilera and Moto Guzzi

@@darrinslack1269 How interesting. I saw my first motorcycle road race at Dodge City, Ks in the summer of "57 and Guiseppe Rottigni ran that little 175cc bike with style and grace. IIRC, he was almost a straightaway ahead of the pack on the first lap of that race, piquing my interest in road racing for decades to come. The 200 Wilcat I raced belonged to a modest shop owner in Queens, NY later on and it was a total weekend winner that hardly ever needed attention mechanically, very sound runner. He had miscellaneous bits and pieces of significant Parilla hardware around his garage, a complete 200cc road race prepared engine set up by Mr. Rottigni himself. I don't recall any other bike manufacturer in that class ever beating Parillas; Ducati was right there with a sound design but they didn't appear to get the tuning and material support to really catch Parilla.

@@whalesong999 I recently did an article on two parilla prototypes with help from the Parilla family , Salmaggi actually designed the Gilera Saturno engine and valve system , he worked on all of Parillas engines , he left and joined Lambretta , there he designed the 250 v twin racer , think moto guzzi v twin and your there , he left Lambretta to join moto guzzi ,#

Solenoid-operated valves have proven very hard on the valves with high closing speeds and forces The idea's been around for a long time--no one has made it practicable yet.