Honda CB125

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CB125
Honda CB125.jpg
1975 Honda CB125S
Manufacturer Honda
Production 1973-1985
Engine 122–124 cc (7.4–7.6 cu in) air-cooled 4-stroke OHC 2-valve single, wet sump
Bore / stroke 56 by 50 millimetres (2.21 in × 1.95 in) 1973-1975
Transmission 5-speed manual, chain drive
Brakes Drum
Fuel capacity 8.7 l; 1.9 imp gal (2.3 US gal)

The Honda CB125 was a 122 cc (7.4 cu in) motorcycle made by Honda from 1971-1975 (1973-1985 in the US). It had an overhead camshaft (OHC) engine with a 9500 rpm redline. The "S" model was produced from 1971 to 1975 and was replaced in 1976 by the "J" model (the US bikes retained the S designation). The newer model sported a two piece head, 124 cc (7.6 cu in) displacement, and a larger carburetor.[1][2]

Major changes[edit]

Aside from different color schemes and minor lettering differences, these are some of the major design changes:

  • 1973 - First year the bike was released in the US as CB125S0.
  • 1974 - Front drum brake changed to disk, tachometer was added.
  • 1976 - Engine displacement increased from 122 to 124 cc (7.4 to 7.6 cu in), tachometer was eliminated.
  • 1979 - Front disk brake was changed back to drum.
  • 1980 - Point ignition was changed to capacitive discharge.
  • 1983 - The bike was not produced this year.
  • 1984 - The electrical system was changed from 6 to 12 volts.
  • 1985 - The last year the bike was released in the US, headlight shape was changed from round to rectangular.

US model year changes[edit]

Identifications, specifications, and changes throughout the years. This chart is for units sold In America only.[1]

Ignition Displacement Front brake Rear brake Instruments Notes
1973 Breaker points 122 cc Drum Drum Speedometer

(only)

6v electrical system

(73-83)

1974 Breaker points 122 cc Mechanical disc Drum Speedometer

and Tachometer

1975 Breaker points 122 cc Mechanical disc Drum Speedometer

and Tachometer

1976 Breaker points 124 cc Mechanical disc Drum Speedometer

(only)

1977
1978 Breaker points 124 cc Mechanical disc Drum Speedometer

(only)

1979 Breaker points 124 cc Single leading shoe

Front brake

Drum Speedometer

(only)

1980 Breaker points 124 cc Single leading shoe

Front brake

Drum Speedometer

(only)

1981 Capacitive Discharge 124 cc Single leading shoe

Front brake

Drum Speedometer

(only)

1982 Capacitive Discharge 124 cc Single leading shoe

Front brake

Drum Speedometer

(only)

1983 Not produced
1984 Capacitive Discharge 124 cc Single leading shoe

Front brake

Drum Speedometer

(only)

12v Electrical system

(84-85)

1985 Capacitive discharge 124 cc Single leading shoe

Front brake

Drum Speedometer

(only)

Rectangular headlight

This table explains the specific changes year to year.

The components of the CB125 did not changed much throughout the years unlike the appearance of the CB125. The majority of the changes made upon the bike was the color of the fuel tank, and the color of the decals. The color and Decals changed every year the Cb125 was produced.


Notes[edit]

  1. ^ a b Honda Motorcycle Identification Guide. American Honda Motor Co., Inc. 2000. pp. 30–50. ISBN 0-964249-1-1-1. 
  2. ^ Scott, Ed (1983). Clymer Honda 100-350cc OHC singles 1969-1982 service-repair-performance. U.S.A.: Jeff Robinson. pp. 0–102. ISBN 978-0-89287-184-1.