CM Motorcycles of Bologna - Model Information

CM Models include:

CM 175 Turismo 1932

• 
  Engine: OHV twin-port vertical single cylinder with cast iron body and head. Bore 58.8, stroke 64.0. Cylinder capacity 173.7cc.
  Ignition: magnet with Marelli
  Carburettor: Dell'Orto (Original Amac)
  Primary: chain drive protected by sheet crankcase
  Multiple dry disk clutch
  3-speed Burman, hand change
  Chain drive transmission
  Tubular chassis

CM 175 Turismo 1933

• 
  Engine: OHV twin-port vertical single with cast iron barrel and head. Bore 58.8, stroke 64.0. Cylinder capacity 173.7cc.
  Ignition: Magneti Marelli
  Carburettor: Amac

  Heavy duty lubrication lubrication with gear pump
  Primary: chain drive
  Multiple dry disk clutch

  4-speed Burman, hand change
  Final drive: Roller chain
  Tyres: 3.00x19
  Brakes: Expansion lateral
  Electrical system: Lucas 6 Volt headlight, tail light, horn, dynamo, battery
  Maximum speed km/h 85

CM 250 Lusso 1934

• 
  Engine: OHV twin-port vertical single with cast iron barrel and head. Bore 64.8, stroke 74.0 mm. Displacement 244cc.
  Ignition: Magneti Marelli
  Carburettor: Amal
  Primary transmission: chain in alloy chaincase
  Multiple disc clutch
  4-speed Burman gearbox, hand change
  Final Drive: Chain Drive
  Frame: Cradle, steel
  Tyres: 3.00x19
  Brakes: Expansion lateral
  Electrics: Lucas 6v dynamo, headlight, tail light, horn, battery
  Maximum speed km/h 110

CM 250 Sport 1934

• 
  Engine: OHV twin-port vertical single with cast iron barrel and head. Bore 64.8, stroke 74.0 mm. Displacement 244.0 cc.
  Ignition: Magneti Marelli
  Amal carburetor
  Dry sump lubrication
  Primary: chain drive
  Multiple dry disk clutch
  Gearbox: 4-speed Burman, foot change
  Final drive: chain
  Chassis: tubular frame
  Tyres: 3.00x19
  Brakes: Expansion lateral
  Electrical system with Marelli headlight, tail light, horn, dynamo, 6 volt battery
  Maximum speed km/h 115

CM 500 Lusso 1935

• 
  Engine: OHV twin-port vertical single with cast iron barrel and head. Bore 78.8, stroke 100.0 mm. Displacement 487.6 cc
  Exhaust: dual exhaust, raised pipes
  Electrics: Bosch lighting and ignition
  Dry sump lubrication
  Primary: chain drive. Multiple disk clutch
  4-speed Burman, foot change.

  Tyres: 3.50x19
  Brakes: Expansion lateral
  Electrical system with Bosch headlight, tail light, horn, dynamo, ammeter, 6 volt battery
  Maximum speed 130 km/h

CM 500 Sport 1935

• 
  Engine: OHV twin-port vertical single with cast iron barrel and head. Bore 78.8, stroke 100.0. Displacement 487.6 cc.
  Ignition: Magneti Marelli
  Carburettor: Dell'Orto
  Dry sump lubrication
  Primary: chain
  Multiple disc clutch
  4-speed Burman gearbox, foot shift
  Tyres: 3.50x19
  Brakes: Expansion lateral
  Electrical system with headlight, tail light, horn, dynamo, ammeter, 6 Volt battery
  Maximum speed 135-140 km/h

CM 350 Super Sport 1935

• 
  4-stroke vertical single cylinder engine with cast iron barrel and head. Bore 71.8, stroke 84.0, capacity 340.1 cc. Valves actuated by Rods and Balancers
  Ignition: Magneti Marelli
  Carburettor: Dell'Orto
  Dry Sump Lubrication
  Primary: Chain transmission with alloy chaincase
  Multiple Disc Clutch
  4-speed Burman gearbox, foot shift
  Chain Transmission
  Tyres: 3.00x19
  Brakes: Expansion lateral
  Electrical system with Marelli light, tail light, horn, dynamo, 6 volt battery
  Maximum speed 115 km/h

CM 250 SZ 1935

• 
  Engine: OHV vertical single with cast iron barrel and head, single exhaust port. Bore 54.8, stroke mm 74.0. Displacement 244.0 cc.
  Ignition: Magneti Marelli
  Carburettor: Dell'Orto
  Primary: chain drive under light alloy cover.
  3-speed Burman gearbox, hand change
  Chain-chain
  Chassis: tubular frame

CM 350 Turismo 1935

• 
  4-stroke vertical single-cylinder engine with cast iron barrel and head. Bore 71.8. Stroke 84.0. Cylinder displacement 340.1 cc. Valves Distributed by Rods and Balancers
  Ignition: Magneti Marelli
  Carburettor: Amal
  Gearbox: 4-speed Burman, foot change
  Chain Transmission
  Tyres: 3.00x19
  Brakes: Expansion lateral
  Electrical system with Lucas headlight, tail light, horn, dynamo, battery 6 Volt
  Maximum speed km/h 110

CM 350 AB 1937

• 
  4-stroke vertical single cylinder engine with cast iron barrel and head. Bore 71.8, stroke 84.0, capacity 340.1 cc. Valves Distributed by Rods and Balancers
  Ignition: Magneti Marelli
  Carburettor: Dell'Orto
  Primary: Chain drive under lightweight alloy cover
  Clutch: Multiple plate
  Gearbox 4 - speed Burman, foot shift
  Frame: Cradle, parallelogram fork, CM rear suspension with swingarm
  Tyres: 3,25x19
  Brakes: Expansion lateral
  Electrical system with Marelli headlight, tail light, horn, dynamo, 6 volt battery
  Maximum speed 115km/h

Other models:

1931 175cc Type GD 70A Normale OHV.

1932 175cc Turismo OHV twin-port.

1933 175cc Turismo OHV single port 4 speed gearbox.

1949-1955 125cc

1949-1953 SS 250cc

1950-1953 160cc

1950-1953 250cc Bicilindrica 2T

1956 Centauro 175cc Monoalbero 4T

1956 175cc Francolini 4T

1950s Motocarri

Sources: motoclub-tingavert.it, Musei Patrimonio Industriale

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