A Brief History of the Marque
The Praga Automobile Company was formed in 1907 with an agreement between František Ringhoffer and the First Czech-Moravian Machine Factory. Ringhoffer left a year later and in 1909 the company adopted the name Praga. Praga initially produced automobiles, then expanded to trucks and eventually motorcycles.
Motorcycle production was brief but notable. Praga absorbed the ailing Breitfeld-Danek concern and with it the brilliant engineer Jaroslav Koch. Between 1929 and 1933 they produced two machines, an SOHC 350 and a DOHC model, the Praga BD 500.
The First Czechoslovak Republic, 1919-1938, was an era of high production at the factory and for a many years Praga produced more automobiles than either Skoda or Tatra, but as war approached the factory moved increasingly toward military production. During WWII most of the factory was destroyed, and subsequently the communist rulers deemed production of trucks, heavy machinery and military equipment to be more suitable for the works.
The former state company was privatized in 1992. In 2004 it began production of Unimog vehicles, and later produced motocross and enduro motorcycles of 250cc to 610cc.
Praga BD 1930 350 OHC Specifications
Four stroke OHC
Cylinder bore Ø 70 mm stroke 90 mm
Cylinder capacity 346 ccm
Power 8.8 kW (12 hp) at 4500 rev / min
Lubrication oil pressure
Carburetor Binks or Amal
Ignition 6V battery Bosch
Multiplate clutch in an oil bath
Three-speed gearbox in unit construction block.
Primary transmission gears
Secondary transmission cardan< br>Drum brakes front and rear
Front tire 19 "x 3.5"
Rear tire 19 "x 3.5"
Length 2130 mm
Width 860 mm
Height 1000 mm
Wheelbase 1400 mm
Weight 140 kg
Max. speed 100 km/h
Fuel consumption 3 l / 100 km
Oil consumption 0.16 l / 100 km
Fri Dec 30 2016
pg350sl at gmail.com
Praga 350 BCS
Hi Sheldon, Great website! Thanks for your efforts. I am looking for any information, photos, spare parts lists etc. for a 350cc Praga. BTW, I think it had a Bowden LH29 carb and not Amal/Binks.
I attach a photo of my Praga 350 BCS (I think this model was called a BCS and not a BD as Praga had already acquired BD by the time this bike was first manufactured in 1930). It is quite rare, with accounts varying between 500-1,000 bikes ever made.
Certain parts on my bike are incorrect (brake pedal, petrol cap, carburettor, tail light (missing) and maybe one or two other parts as well). Otherwise she is pretty much complete.
Many thanks. Paul