Honda CD175
Encyclopedia
The Honda
CD175 was a 174-cc motorcycle
introduced in USA, Canada
, UK, Africa
, Asia
, Australia
, Pakistan
and New Zealand
in 1967. It was the touring model in Honda's 175 cc motorcycle lineup that also included the sportier CB 175 and the off road CL175 version. The CD175 shared many components and design elements in common with the contemporary CD125 and SS125 models from Honda including stamped "t-bone" frame, swingarm, double seat, and electrics among other things. At the time this motorcycle offered some very progressive and attractive standard design elements like electric start (except in England), winkers, mirrors, and ease of maintenance. It was also noted for its well designed and very quiet exhaust silencers. The "sloper" engine used on earlier models was an evolutionary version of the older Honda CB160 power plant and contained many of the same components including most of the castings and internal items.
Main features of the CD175 included a 360 degree crankshaft
, wasted spark
ignition, single carburetor
to cut down maintenance, a parallel twin high revving engine
, 16" wheels and a speedometer
that calibrated to 100 mph (160 km/h). Each connecting rod big end had roller bearings
to ensure a smooth ride at high revs. There were several variations of this bike (namely K0, K3, T, T4 etc)from 1967 to 1979.
Maximum theoretical top speed was 78.3 mph/125 km/h (based on combined final drive in top gear at 11000 rpm).
This bike offered a relatively quicker ride compared to a cheaper cost (50 miles per gallon
) but suffered from weak brakes (being only cable operated single-leading-shoe drum brakes). Also the 6 volt electric system made the lights quite inadequate at any speed over 30 mph on a dark night. In 1979 this model was replaced by Honda CD185.
1967 models (product code 237) began at serial number CD175-1000001. Also known as the CA175, CD175A, or CD175 K0 just over 17000 of these units were built and distributed worldwide although only to commonwealth countries. Styling and appearance on these early CD models was similar to the larger CB450K0
"Black Bomber", especially the British version which received a set of low-rise handlebars (as well as no electric start and different winker positions).
1968 models (also product code 237) began at serial number CD175-10017136 and incorporated changes that allowed for export to the USA. These changes included a different fuel tank with larger, less pointy chrome covers and knee pads, larger more bulbous battery and tool covers, upgraded lighting and signals/switches, and a hybrid welded-tube/stamped frame. The engine remained unchanged from 1967.
1969 "K3" models (product code 302) introduced the vertical engine and all-tube frame and some smaller body work changes that continued until the end of production in 1979.
Displacement: 174 cc
Engine:
1967 to 1968:4 stroke 360 degree parallel twin; air cooled; single overhead cam (chain driven); cylinders inclined 30 degrees forward from vertical ("sloper" engine); 9.0:1 compression ratio; max 17 bhp @ 10,500 rpm.
1969 to 1979: 4 stroke 360 degree parallel twin; air cooled; single overhead cam (chain driven); vertical cylinders ("vertical" engine); 9.0:1 compression ratio; max 15 bhp @ 10,000 rpm
Fuel system: Single 22 mm Carburetor
, cylindrical slide type (Keihin Seiki PW-22)
Gearbox: 4 speed, wet clutch
(1st-2.769; 2nd-1.778; 3rd-1.318; 4th-1.040); Gear-driven primary drive (3.70:1); chain-driven final drive (2.470:1)
Electrics: 6 volt (battery ignition)
Valves: 2 valves / cylinder
Exhaust: 2 into 2 with baffle type silencers.
Top Speed 78.3 mph (125 km/h)
Honda
is a Japanese public multinational corporation primarily known as a manufacturer of automobiles and motorcycles.Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than...
CD175 was a 174-cc motorcycle
Motorcycle
A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...
introduced in USA, Canada
Canada
Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...
, UK, Africa
Africa
Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...
, Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...
, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
, Pakistan
Pakistan
Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...
and New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...
in 1967. It was the touring model in Honda's 175 cc motorcycle lineup that also included the sportier CB 175 and the off road CL175 version. The CD175 shared many components and design elements in common with the contemporary CD125 and SS125 models from Honda including stamped "t-bone" frame, swingarm, double seat, and electrics among other things. At the time this motorcycle offered some very progressive and attractive standard design elements like electric start (except in England), winkers, mirrors, and ease of maintenance. It was also noted for its well designed and very quiet exhaust silencers. The "sloper" engine used on earlier models was an evolutionary version of the older Honda CB160 power plant and contained many of the same components including most of the castings and internal items.
Main features of the CD175 included a 360 degree crankshaft
Crankshaft
The crankshaft, sometimes casually abbreviated to crank, is the part of an engine which translates reciprocating linear piston motion into rotation...
, wasted spark
Wasted spark
The wasted spark system is an ignition system used with some four-stroke cycle internal combustion engines. In a wasted spark system, the spark plugs fire in pairs even though one is on its compression stroke and one is on its exhaust stroke. The extra spark on the exhaust stroke has no effect and...
ignition, single carburetor
Carburetor
A carburetor , carburettor, or carburetter is a device that blends air and fuel for an internal combustion engine. It is sometimes shortened to carb in North America and the United Kingdom....
to cut down maintenance, a parallel twin high revving engine
Engine
An engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...
, 16" wheels and a speedometer
Speedometer
A speedometer is a gauge that measures and displays the instantaneous speed of a land vehicle. Now universally fitted to motor vehicles, they started to be available as options in the 1900s, and as standard equipment from about 1910 onwards. Speedometers for other vehicles have specific names...
that calibrated to 100 mph (160 km/h). Each connecting rod big end had roller bearings
Needle roller bearing
A needle roller bearing is a bearing which uses small cylindrical rollers. They are used to reduce friction of a rotating surface.Needle bearings have a large surface area that is in contact with the bearing outer surfaces compared to ball bearings...
to ensure a smooth ride at high revs. There were several variations of this bike (namely K0, K3, T, T4 etc)from 1967 to 1979.
Maximum theoretical top speed was 78.3 mph/125 km/h (based on combined final drive in top gear at 11000 rpm).
This bike offered a relatively quicker ride compared to a cheaper cost (50 miles per gallon
Gallon
The gallon is a measure of volume. Historically it has had many different definitions, but there are three definitions in current use: the imperial gallon which is used in the United Kingdom and semi-officially within Canada, the United States liquid gallon and the lesser used United States dry...
) but suffered from weak brakes (being only cable operated single-leading-shoe drum brakes). Also the 6 volt electric system made the lights quite inadequate at any speed over 30 mph on a dark night. In 1979 this model was replaced by Honda CD185.
Specifications
Years of Production 1967–19791967 models (product code 237) began at serial number CD175-1000001. Also known as the CA175, CD175A, or CD175 K0 just over 17000 of these units were built and distributed worldwide although only to commonwealth countries. Styling and appearance on these early CD models was similar to the larger CB450K0
Honda CB450
The Honda CB450 was the first "big" Honda motorcycle with a 444cc dual overhead cam engine producing 43-45 horsepower . Appearing first in the 1965 four-speed K0 model, and progressing through a series of KX models with various improvements and styling changes, notably a redesigned gas tank and 5...
"Black Bomber", especially the British version which received a set of low-rise handlebars (as well as no electric start and different winker positions).
1968 models (also product code 237) began at serial number CD175-10017136 and incorporated changes that allowed for export to the USA. These changes included a different fuel tank with larger, less pointy chrome covers and knee pads, larger more bulbous battery and tool covers, upgraded lighting and signals/switches, and a hybrid welded-tube/stamped frame. The engine remained unchanged from 1967.
1969 "K3" models (product code 302) introduced the vertical engine and all-tube frame and some smaller body work changes that continued until the end of production in 1979.
Displacement: 174 cc
Engine:
1967 to 1968:4 stroke 360 degree parallel twin; air cooled; single overhead cam (chain driven); cylinders inclined 30 degrees forward from vertical ("sloper" engine); 9.0:1 compression ratio; max 17 bhp @ 10,500 rpm.
1969 to 1979: 4 stroke 360 degree parallel twin; air cooled; single overhead cam (chain driven); vertical cylinders ("vertical" engine); 9.0:1 compression ratio; max 15 bhp @ 10,000 rpm
Fuel system: Single 22 mm Carburetor
Carburetor
A carburetor , carburettor, or carburetter is a device that blends air and fuel for an internal combustion engine. It is sometimes shortened to carb in North America and the United Kingdom....
, cylindrical slide type (Keihin Seiki PW-22)
Gearbox: 4 speed, wet clutch
Clutch
A clutch is a mechanical device which provides for the transmission of power from one component to another...
(1st-2.769; 2nd-1.778; 3rd-1.318; 4th-1.040); Gear-driven primary drive (3.70:1); chain-driven final drive (2.470:1)
Electrics: 6 volt (battery ignition)
Valves: 2 valves / cylinder
Cylinder (engine)
A cylinder is the central working part of a reciprocating engine or pump, the space in which a piston travels. Multiple cylinders are commonly arranged side by side in a bank, or engine block, which is typically cast from aluminum or cast iron before receiving precision machine work...
Exhaust: 2 into 2 with baffle type silencers.
Top Speed 78.3 mph (125 km/h)