Honda CB125

CB125

1975 Honda CB125S
Manufacturer	Honda
Production	1969-1985
Engine	122–124 cc (7.4–7.6 cu in) air-cooled 4-stroke OHC 2-valve single, wet sump
Bore / stroke	2.205 inches (56.0 mm) * 1.949 inches (49.5 mm)
Top speed	65 mph (105 km/h)[citation needed]
Power	12 horsepower (8.9 kW) @ 9000 rpm[citation needed]
Torque	7.28 pound-feet (9.87 N·m) @ 8000 rpm[citation needed]
Transmission	5-speed, chain drive
Brakes	Drum
Weight	190 pounds (86 kg)[citation needed] (wet)
Fuel consumption	100 miles per US gallon (43 km/L)[citation needed]

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. It could comfortably maintain speeds of 55 mph (89 km/h) and had a top speed of around 65 mph (105 km/h).^{[citation needed]} The engine could last tens of thousands of miles with only minimal attention;^{[citation needed]} however, the oil had to be changed regularly (700 miles) to prevent premature wear of the camshaft bearings.^{[citation needed]} 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 carburettor, but it did not perform as well as the earlier models.^{[citation needed]}

Major changes

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.

Notes