Honda CB550 FOUR-II 1975

1975 Honda Dream CB550 FOUR-2 (Newer Model) Specs, Features & Photos Gallery

Honda CB550 FOUR-II
ホンダ ドリーム CB550FOUR-II photo.
Release date: 1975-06-24.

Honda released a new 4-cylinder bigbike Honda Dream CB550 FOUR-II, which has a quiet and mild driving feeling from city driving to long touring as the successor of CB550F old.

The biggest difference between CB550 FOUR-II and the old model CB550F-1 is that the muffler adopts a 4 into 1 collecting pipe like the CB400FOUR and CB750FOUR-II, but the following improvements were also implemented.

  • A new intake duct has been installed in the air cleaner to improve intake efficiency and reduce intake noise.
  • Increased fuel tank capacity to 17 liters.
  • Change the key to a double-sided key. In addition, it is also used as a steering lock and relocated to the top surface.
  • Equipped with side stand automatic storage mechanism and bank sensor.

As an intermediate model in the Honda 4-cylinder series, this car adopts an easy-to-ride, tenacious engine that emphasizes low- and medium-speed torque, and a collective exhaust system as a measure against exhaust noise. It is a comfortable two-wheeled vehicle with convenient new equipment.

Main Features

  • ● Equipped with a highly reliable 4-cylinder OHC 544cc 50 horsepower engine. By adopting an intake/exhaust system typified by a collective exhaust pipe, it is quiet, strong at low and medium speeds, and has flat torque characteristics.
  • ● In addition to high maneuverability and stability, the seat that provides easy knee grip and the shape of the tank combine to create an excellent riding position that reduces fatigue even during long touring. increase.
  • ● A youthful and fresh design with a mild and easy-to-ride atmosphere with a unique exhaust system.

Honda CB550 FOUR-II Release date

June 24, 1975

Honda CB550 FOUR-II Price

398,000 yen
(national standard cash price).
Monthly production plan : 4,000 units (including exports)

Honda CB550 FOUR-II Features

Engine related

  • 1. Newly installed intake duct in the air cleaner improves intake efficiency and reduces intake noise.
  • 2. The exhaust pipes for each cylinder are integrated into one in a clover shape. Of the three expansion chambers, the large-capacity first expansion chamber first absorbs the sound of explosions, and the pulsation effect promotes exhaust from the other cylinders, while efficiently emphasizing low- and mid-speeds for strong output and a quiet exhaust sound. was obtained.
  • 3. A new throttle linkage has been adopted to reduce wrist fatigue.


  • 1. The highly rigid full double cradle type frame with excellent maneuverability and stability is lightweight and easy to handle.
  • 2. A large-capacity (17 liter) teardrop-type (raindrop-shaped) tank that is easy to grip in the knees, a slender seat shape, a high handlebar, and an appropriate step position are matched to make handling easier and less tiring. It forms a good riding form.
  • 3. Adopts the same fully embedded flat fuel tank cap as the CB750FOUR-II. Comes with a mechanism to prevent forgetting to tighten the cap and a chain to prevent loss.
  • 4. Classical and mild tank shape, subdued color tone, and unique collective exhaust pipe create a design that adds a modern touch to a calm weight.

Consideration for ease of handling and safety

  • 1. Equipped with the same mechanism as the CB750FOUR-II that automatically retracts the side stand.
  • 2. Equipped with a bank sensor that warns the bank angle, the same as the CB750FOUR-II.
  • 3. Uses an easy-to-use double-sided key. In addition, it is equipped with a lock-cum-top main switch mechanism.
  • 4. Large rearview mirrors (114φ) are equipped as standard on both the left and right sides to provide a wide rear view. A large (94φ) lamp that is easy to identify is also used for the turn signal light.

Honda CB550 FOUR-II Specifications

Main specs of Honda CB550 FOUR-2 model year 1975-1977 :
Motorcycle name/modelCB550 FOUR-II
Total length (m)2.115
Width (m)0.835
Total height (m)1.110
Wheel Distance (m)1.405
Minimum ground clearance (m)0.160
Vehicle weight (Kg)206
Fuel consumption (Km/L)
(60Km/h time constant driving test value)
Slope climbing ability (tan)0.55
Minimum turning radius (m)2.4
Engine modelAir-cooled 4-cycle OHC 4-cylinder
Total displacement (cc)544
Inner Diameter x Stroke (mm)58.5×50.6
Compression Ratio9.0
Max Power (PS/rpm)50/8,500
Max torque (Kg-m/rpm)4.4/7,500
Starting methodBoth kick and self-drive
Lubrication methodCombination of pumping and splashing methods
Lubricant capacity (L)3.2
Fuel tank capacity (L)17
Clutch typeWet multi-plate
Transmission typeConstant mesh 5-speed return
Transmission operation methodLeft foot type
Transmission ratio1st gear 2.353
2nd gear 1.636
3rd gear 1.269
4th gear 1.036
5th gear 0.900
Total reduction ratio6.665
Frame formatDouble cradle format
Suspension methodFront: telescopic type Rear: swing arm type
Caster (degrees)64°0′
Trail (mm)105
Tire sizeFront: 3.25S19-4PR Rear: 3.75S18-4PR
Brake typeFront: Hydraulic disc
Rear: Rod type leading trailing
Headlight50W/40W 170φ
Taillight8W (also used as number light)
Direction indicatorsFront: 23W x 2 Rear: 23W x 2
HarmonicSwirl electric
SpeedometerEddy current
TachometerEddy current

In the late 1970s, when the OHC 2-valve parallel 4-cylinder that had been handed down for generations began to decline, in 1978, the DOHC 4-valve 6-cylinder flagship CBX appeared like a gust of wind. The times began to seek tasteful, well-chiseled features with more sophisticated mechanisms. However, in fact, if you think about the taste of Japanese people, you should also find a taste of a small face and baby face mask rather than a big head DOHC. The 4-valve exhaust sound is more like that of a tenor saxophone, and the 2-valve big valve sound is similar to that of an alto saxophone. The difference is more clearly expressed when the exhaust is grouped.


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