Honda C70 Passport, C70M, CM70 Motorcycles


1970-71 Honda C70M (also called C70MK0 or CM70)

Engine

Engine Type 72cc OHC single cylinder
Spark plug C7HSA
Plug gap .028
Battery 6YB11-2D or 6N11-2D

DRIVETRAIN

Transmission 3-speed with an automatic clutch

CHASSIS / SUSPENSION / BRAKES

N/A

DIMENSION

N/A

OTHER

  • Like the early cub, this model did not significantly look any different
  • Colors:
    • Aquarius blue
    • Bright red
    • Pine green
  • Leg guard/cowling: white
  • Fuel tank emblem read “HONDA 70”
  • Seat: long (for two riders)
  • Rear footpegs: standard
  • Tail light: large tail light common to other Hondas of the ’70s
  • Serial number began: C70M-017962

1972-73 Honda C70K1 (also called C70MK1)

Engine

Engine Type 72cc OHC single cylinder
Spark plug C6HSA
Plug gap .028
Starter electric start
Battery 6YB11-2D or 6N11-2D

DRIVETRAIN

Transmission 3-speed with an automatic clutch

CHASSIS / SUSPENSION / BRAKES

N/A

DIMENSION

N/A

OTHER

  • Like the early cub, this model did not significantly look any different
  • Colors:
    • Strato Blue Metallic
    • Poppy Yellow Metallic
  • Leg guard/cowling: White
  • Fuel tank emblem read “HONDA 70”
  • Seat: short
  • Accessory: luggage rack over the rear wheel
  • Tail light: large tail light common to other Hondas of the ’70s
  • Serial number began: C70-2000000

1980 Honda C70 Passport

Engine

Engine Type 72cc OHC single cylinder
Spark plug C6HSA
Plug gap .028
Starter electric start
Electrical six-volt system like the previous models
Battery 6YB11-2D or 6N11-2D

DRIVETRAIN

Transmission 3-speed with an automatic clutch

CHASSIS / SUSPENSION / BRAKES

N/A

DIMENSION

N/A

OTHER

  • Similar shape to the early cub
  • Colors:
    • Parakeet Yellow
    • Angel Blue
  • Leg guard/cowling: White
  • On the yellow bike, the long seat was brown and white
  • On the blue model the long seat was black and white
  • Accessory: Basket and rack were mounted above the front fender and a short luggage rack was mounted behind the seat
  • A “HONDA C70” logo appeared on the fuel tank
  • Serial number began: DA01-1000014

1981 Honda C70 Passport

Engine

Engine 72cc OHC single cylinder
Ignition breaker points
Spark plug C6HSA
Plug gap .028
Starter electric start
Electrical six-volt system like the previous models
Battery 6YB11-2D or 6N11-2D

DRIVETRAIN

Transmission 3-speed with an automatic clutch

CHASSIS / SUSPENSION / BRAKES

N/A

DIMENSION

N/A

OTHER

  • Like the 1980 model with only a few exceptions
  • The VIN had the 17 digits which indicated the country (first character), manufacturer (second character), year (10th character), and factory (11th character)
  • Example: JH2DA0107BS100001
    • J=Japan
    • H=Honda
    • B=1981
    • S=Suzuka factory
  • Colors:
    • Parakeet Yellow
    • Angel Blue
    • Monza Red
  • Long seat: black and white
  • Leg guard/cowling: white
  • Cowling now had another cutout next to the cylinder head
  • Accessory: basket and rack were mounted above the front fender and a short luggage rack was mounted behind the seat
  • “PASSPORT” logo appeared on the fuel tank
  • Serial number began JH2DA0106BS100003

1982 Honda C70 Passport

Engine

Engine 72cc OHC single cylinder
Ignition breaker points
Spark plug C6HSA
Plug gap .028
Starter electric start It now had a 12-volt system unlike the previous models
Electrical six-volt system like the previous models
Battery YB5L-B

DRIVETRAIN

Transmission 3-speed with an automatic clutch

CHASSIS / SUSPENSION / BRAKES

N/A

DIMENSION

N/A

OTHER

  • Like the 1981 model with only a few exceptions
  • The VIN had the 17 digits which indicated the country, manufacturer, year, and factory
  • Example: JH2DA0107CS200001
    • J=Japan
    • H=Honda
    • C=1982
    • S=Suzuka factory
  • Colors:
    • Angel Blue
    • Monza Red
  • Leg guard/cowling: white (redesigned slightly)
  • Side covers: redesigned slightly
  • Long seat: black and white
  • Accessory: basket and rack were mounted above the front fender and a short luggage rack was mounted behind the seat
  • “PASSPORT” logo appeared on the fuel tank

1983 Honda C70 Passport

Engine

Engine 72cc, OHC, four-stroke, single cylinder
Bore & Stroke 47×41.4mm
Compression ratio 8.8:1
Ignition CDI with flywheel magneto
Spark plug CR7HS
Plug gap .028
Starter Electric and kick
Exhaust single muffler
Electrics 12-volt system
Electrical six-volt system like the previous models
Battery YB5L-B

DRIVETRAIN

Transmission Three-speed constant mesh
Clutch Wet multi-plate automatic centrifugal
Drive Fully-enclosed drive chain reduces maintenance
Wheels Wire spoke type

CHASSIS / SUSPENSION / BRAKES

Brakes Front and rear drum
Front Suspension Bottom link type
Rear Suspension Swing arm
Front Tire Size 2.25-17
Rear Tire Size 2.50-17

DIMENSION

Wheelbase 1181mm (46.5 in.)
Overall length 1800mm (46.5 in.)
Overall width 660mm (26 in.)
Seat height 760mm (29.9 in.)
Dry weight 82 kg (180.8 lb)
Fuel capacity 4 liter (1.1 US gal.) (0.88 Imp. gal.)

OTHER

  • Like the 1982 model with only a few exceptions
  • VIN had the 17 digits which indicated the country, manufacturer, year, and factory
  • Serial number began: JH2DA0107DS300004 where D indicates 1983
  • Colors:
    • Shuttle Blue Metallic
    • Special Silver Metallic
    • Monza Red
  • Leg guard/cowling: white
  • Long seat: black and white
  • Accessory: basket and rack mounted above the front fender and a short luggage rack mounted behind the seat
  • The word “HONDA” was on the fuel tank and the word “PASSPORT” was on the side cover
  • The cowling eliminated the open cutouts of the previous years and installed pop-in covers in their place
  • The rear shocks were chromed and were longer

1984 Honda C70 Passport

Engine

Engine OHC, four-stroke, single cylinder
Bore & Stroke 47×41.4mm
Compression ratio 8.8:1
Ignition CDI with flywheel magneto
Spark plug CR7HS
Plug gap .028
Starter Electric and kick
Exhaust single muffler
Battery YB5L-B

DRIVETRAIN

Transmission Three-speed constant mesh
Clutch Wet multi-plate automatic centrifugal
Drive Fully-enclosed drive chain reduces maintenance
Wheels Wire spoke type

CHASSIS / SUSPENSION / BRAKES

Brakes Front and rear drum
Front Suspension Bottom link type
Rear Suspension Swing arm
Front Tire Size 2.25-17
Rear Tire Size 2.50-17

DIMENSION

Wheelbase 1180mm (46.5 in.)
Overall length 1800mm (46.5 in.)
Overall width 660mm (26 in.)
Seat height 760mm (29.9 in.)
Dry weight 82 kg (180.8 lb)
Fuel capacity 4 liter (1.1 gal.)

OTHER

  • Like the 1982 model with only a few exceptions
  • Serial number began JH2DA0107ES300004 (E=1984)
  • Accessories: Standard front basket and rear carrying rack
  • Colors:
    • Special Silver Metallic
    • Shuttle Blue Metallic

CM70 Image Gallery

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