The Honda CB450 Four motorcycle was produced from 1967 to 1968 and was equipped with a four-stroke, parallel twin-cylinder engine with a capacity of 445 cc. It had a compression ratio of 9.0:1 and was cooled by air. The bike utilized 2x 32mm Keihin carburetors, coil with auto-advance ignition and twin contact breaker starting. The maximum power output was recorded at 45 hp and 32.8 kW at 9000 rpm, with maximum torque of 37.4 Nm and 27.6 lb-ft at 7000 rpm. The bike came with a 5-speed transmission and a chain final drive. The frame of the bike was a tubular semi-duplex cradle with a single down tube. Both the front and rear suspensions had dampening shock absorbers, and the rear suspension was a swing arm with adjustable preload. The front and rear brakes were both drum brakes. The bike had a wheelbase of 1300 mm and weighed 187 kg dry, with a fuel capacity of 14 litres.
Technical specifications:
Make Model: Honda CB 450
| Year | 1967 – 68 |
|---|---|
| Engine | Four stroke, parallel twin cylinder, DOHC, 2 valves per cylinder |
| Capacity | 445 cc / 27.1 cu-in |
| Bore x Stroke | 70 x 57.8 mm |
| Cooling System | Air cooled |
| Compression Ratio | 9.0:1 |
| Induction | 2x 32mm Keihin carburetors |
| Ignition | Coil with auto-advance, twin contact breaker |
| Starting | Kick |
| Max Power | 45 hp / 32.8 kW @ 9000 rpm |
| Max Torque | 37.4 Nm / 27.6 lb-ft @ 7000 rpm |
| Transmission | 5 Speed |
| Final Drive | Chain |
| Frame | Tubular semi-duplex cradle with single front down-tube |
| Front Suspension | Telescopic forks with two-way damping. |
| Rear Suspension | Swing arm, shock absorbers with adjustable preload |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| Front Tyre | 3.25-18 |
| Rear Tyre | 3.50-18 |
| Wheelbase | 1300 mm / 53 in |
| Dry Weight | 187 kg / 412 lbs |
| Wet Weight | 204.0 kg / 449.7 lbs |
| Fuel Capacity | 14 Litres / 3.7 US gal |
