The Italian Parilla motorcycles used a "high camshaft" and short push-rods, fitted in a tower on the left side of the engine and driven by a short chain though some had gears there as well. Might be worth a spot in this assortment also. They were imported to the U.S. in the late '50s by Cosmopolitan Motors and were about equally popular as Ducati until they were discontinued in the early '60s. I was sponsored on a 200cc Wildcat model and wasn't beaten on it for several years, riding in scrambles in N.Y.
@@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 ,#
I knew about most of these valvetrains before but there is always something more to learn about engineering since most engine configurations were done before 1930all the best from Lancashire
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.
Thank you Jwa, the 1929 PRAGA alone would make a excellent video. 1929 and
D.O.H.C. and Cams over buckets, fascinating!
Só ém escutar o ronco fico.emocionado lindas máquinas...Monteiro Paraíba brasil Valeu eu fui
The Italian Parilla motorcycles used a "high camshaft" and short push-rods, fitted in a tower on the left side of the engine and driven by a short chain though some had gears there as well. Might be worth a spot in this assortment also. They were imported to the U.S. in the late '50s by Cosmopolitan Motors and were about equally popular as Ducati until they were discontinued in the early '60s. I was sponsored on a 200cc Wildcat model and wasn't beaten on it for several years, riding in scrambles in N.Y.
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 ,#
Brilliant and thank you
I knew about most of these valvetrains before but there is always something more to learn about engineering since most engine configurations were done before 1930all the best from Lancashire
Excellent!
That is why I love my two strokes.
За 120 лет как поменялся звук выхлопа!
My cat says we are now leaving all these cumbersome clockwork designs and entering a new era of Electromagnetically operated valves 🐱👍🏿
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.
Didn't Bristol make a motorcycle with single-sleeve valves? I believe it was a 1000cc flat-twin.
What about the pneumatic valves as used in modern Moto GP bikes?
I had a Ducati Monza 250 in the late 60's and it sounder just like that, I loved the bike but hated that tinny sound they made
Witam wszystkich serdecznie życzę powodzenia w dalszych działaniach Dobrego Dnia życzy Stary Baca który kocha Ludzi i motocykle
بسیار عالی 👍👍👍
Ducati 250 engine shown is not a desmo version but one that relies on (hairpin) springs for valve closing. Looks almost the same from the outside.
Que du bonheur❤